On cross-examination, Dr. Harper testified that in his opinion, based on his observations of and conversations with the defendant, defendant knew the difference between right and wrong and knew the nature and quality of his acts. Defendant maintains in his first assignment of error that Dr. Harper was not treating the defendant in an effort to cure him. At this time, he was merely observing, evaluating and diagnosing the defendant to prepare himself to testify at defendant’s trial. Defendant argues that our decisions in State v. Wade, 296 N.C. 454, 251 S.E. 2d 407 (1979) and State v. Bock, 288 N.C. 145, 217 S.E. 2d 513 (1975), death sentence vacated, 428 U.S. 903 (1976), hold that such a non-treating physician cannot state his opinion based upon personal knowledge but may only respond to a hypothetical question.
*7Defendant’s reading of Wade and Bock is completely erroneous. The rule is that when the facts upon which the expert bases his opinion “ ‘are all within the expert’s own knowledge, he may relate them himself and give his opinion; or, within the discretion of the trial judge, he may give his opinion first and leave the facts to be brought out on cross-examination. . . .’” State v. Abernathy, 295 N.C. 147, 162, 244 S.E. 2d 373, 383 (1978), quoting 1 Stansbury, N.C. Evidence § 136, p. 446 (Brandis rev. 1973); State v. Hunt, 297 N.C. 258, 262, 254 S.E. 2d 591, 595 (1979); State v. Hightower, 187 N.C. 300, 121 S.E. 616 (1924).
In State v. DeGregory, 285 N.C. 122, 203 S.E. 2d 794 (1974), we held that it was proper to allow Dr. Robert Rollins of Dorothea Dix Hospital, whom the trial judge had ordered to examine the defendant, to give his opinion of defendant’s mental capacity based on his personal examination and interview of the defendant, “and any other information contained in his official record. . . .” Id. at 131, 203 S.E. 2d at 800. Dr. Rollins specifically stated in his testimony quoted by this Court in DeGregory that, “I was not treating Mr. DeGregory. I was just diagnosing. . . .” Id. at 131, 203 S.E. 2d at 801 [Emphasis added.] It was further explained in DeGregory that the expert may have personal knowledge of some facts even though he did not personally make the observations in order to gather those facts.
“ ‘With the increased division of labor in modern medicine, the physician making a diagnosis must necessarily rely on many observations and tests performed by others and recorded by them; records sufficient for diagnosis in the hospital ought to be enough for opinion testimony in the courtroom.’ ” Id. at 134, 203 S.E. 2d at 802, quoting Birdsell v. United States, 346 F. 2d 775, 779-80 (5th Cir.), cert. denied, 382 U.S. 963 (1965).
The specific issue in Wade and Bock was whether the expert could give his opinion based upon his personal knowledge when that knowledge came from and his opinion was based upon (in whole or in part) conversations with the patient. The rule was stated and applied in Bock as follows:
“ ‘Where an expert witness testifies as to the facts based upon his personal knowledge, he may testify directly as to his opinion. Generally, however, an expert witness can*8not base his opinion on hearsay evidence. . . Cogdill v. Highway Commission and Westfeldt v. Highway Commission, 279 N.C. 313, 326, 182 S.E. 2d 373, 381 (1971). The opinion of a physician, however, is not ordinarily rendered inadmissible by the fact that it is based wholly or in part on statements made to him by the patient, if those statements are made in the course of professional treatment and with a view of effecting a cure, or during an examination made for the purpose of treatment and cure. Penland v. Coal Co., 246 N.C. 26, 31, 97 S.E. 2d 432, 436 (1957). See 1 Stansbury’s North Carolina Evidence § 136 (Brandis Rev., 1973). In such a situation it is reasonable to assume that the information which the patient gives the doctor will be the truth, for self-interest requires it. Here, however, Dr. Smith [who testified for the defendant] did not examine defendant for the purpose of treating him as a patient, but for the purpose of testifying as a witness for defendant in this case in which he is charged with first-degree murder. The motive which ordinarily prompts a patient to tell his physician the truth is absent here. The evidence was therefore incompetent and properly excluded.” State v. Bock, supra at 162-63, 217 S.E. 2d at 524. [Emphasis in original.]
In Wade, the expert was Dr. Maloney to whom the defendant had been referred for treatment by Dorothea Dix Hospital. The general rule that an expert may give an opinion based on facts within his personal knowledge without resort to a hypothetical question was noted. Then, it was stated that “[pjroblems arise . . . when a physician’s opinion is derived in whole or in part through information received from another . . . because of a second rule . . . that ... ‘an expert witness cannot base his opinion on hearsay evidence.’ Cogdill v. Highway Commission, 279 N.C. 313, 327, 182 S.E. 2d 373, 381 (1971);” State v. Wade, supra at 458, 251 S.E. 2d at 409.
The Court noted, from a thorough analysis of the major cases on this issue, that a common element in our cases is the requirement that in order for the expert to be able to give an opinion based on his personal knowledge when that includes information supplied to the physician by others, including the patient, the information must be inherently reliable even though it is not independently admissible into evidence. When the opinion is ad*9missible the expert may testify to the information he relied on in forming the opinion, not for substantive purposes, but for the purpose of showing the basis of the opinion. State v. Wade, supra. Thus stated, it can be seen that Bock is but a more specific statement and application of the broader reliability requirement set forth in Wade.
In Wade, there were two indicia of reliability to support the admission of Dr. Maloney’s opinion: defendant was sent to him as a patient for treatment and a sufficient indication of reliability was found in the nature of Dr. Maloney’s entire examination. The nature of the examination was explained as follows:
“The examination . . . was a thorough, carefully designed attempt to gain an understanding of defendant’s state of mind. Dr. Maloney did not rely for his conclusions on any one statement by defendant or on any particular fact he disclosed. Instead he took into account the entirety of what defendant said together with his own interpretation and analysis of it and the objective manifestations that accompanied it. . . . Conversation, and its interpretation and analysis by a trained professional, is undoubtedly superior to any other method the courts have for gaining access to an allegedly insane defendant’s mind. When it is conducted with the professional safeguards present here, it provides a sufficient basis for the introduction of an expert diagnosis into evidence." Id. at 463, 251 S.E. 2d at 412. [Emphasis added.]
Dr. Harper was not a treating physician but he conducted thorough and professional examinations of the defendant. He took into account the entirety of what defendant said together with his own interpretation and analysis of it and the objective manifestations that accompanied it. Thus, his opinion was properly admitted into evidence. State v. Wade, supra. Since the opinion was admissible, it was proper for him to testify concerning the content of his conversations with defendant in order to show the basis for his diagnosis. Id. This assignment of error is overruled.
 Prior to putting Dr. Harper on the witness stand, defendant sought to introduce testimony from his sister and mother regarding his childhood attitudes, school attendance, his father’s drinking problem, and an episode when defendant was thirty years old when he cut his wrists with a razor blade. (Defendant was age *10forty-seven at the time of Mary Hamer’s death.) Defendant attempted to get this testimony in as foundation testimony upon which to ask a hypothetical question of Dr. Harper concerning his diagnosis of defendant’s mental illness.
The trial judge refused to allow the testimony to be given. He explained that, “I think that if you were to get Dr. Harper’s opinion in then you could go into how he reached that opinion; but I think you’re going at it backwards. ... I think you can go into it to explain the opinion that he is insane.” This constitutes defendant’s fifth assignment of error.
 Defendant did not desire to elicit Dr. Harper’s opinion on insanity. He wanted to ask Dr. Harper a hypothetical question concerning whether defendant had a mental disease or defect. In this State,
“ ‘[a]n accused is legally insane and exempt from criminal responsibility by reason thereof if he commits an act which would otherwise be punishable as a crime, and at the time of so doing is laboring under such a defect of reason, from disease of the mind, as to be incapable of knowing the nature and quality of the act he is doing, or, if he does know this, incapable of distinguishing between right and wrong in relation to such act.’ ” State v. Potter, 285 N.C. 238, 249, 204 S.E. 2d 649, 656 (1974), quoting State v. Swink, 229 N.C. 123, 125, 47 S.E. 2d 852, 853 (1948).
Establishing that defendant had a mental disease or defect at the time of the commission of the crime is thus a relevant link in defendant’s chain of evidence, see, State v. Vernon, 208 N.C. 340, 180 S.E. 590 (1935), though standing alone it is not sufficient to completely make out the defense of insanity. State v. Potter, supra.
Furthermore, even though Dr. Harper had personally examined the defendant so that, as we have held above, he was qualified to give an opinion based on his personal knowledge, defendant nevertheless should not have been precluded from asking a hypothetical question if that is the manner in which he wanted to elicit this testimony. 31 Am. Jur. 2d, Expert and Opinion Evidence § 37 (1967) and cases cited therein. (Of course, the reverse is not true. An expert with personal knowledge may base *11his opinion on that knowledge without the use of a hypothetical question or he may respond to a hypothetical question; however, an expert without such personal knowledge may respond only to a hypothetical question. He is not qualified to give his opinion based on personal knowledge when, by definition, he has none.)
 Nevertheless, we uphold the rulings of the trial judge in refusing to admit this tesimony because it concerned times too remote to have any relevance to defendant’s mental condition at the time of the death of Mary Hamer.
“Where the line is to be drawn between evidence that is too remote and evidence that is not, is not a new question. The rule in this respect, which is in accord with our decisions, is given by Stansbury on Evidence, sec. 90, p. 170, as follows: ‘Whether the existence of a particular state of affairs at one time is admissible as evidence of the same state of affairs at another time, depends altogether upon the nature of the subject matter, the length of time intervening, and the extent of the showing, if any, on the question of whether or not the condition had changed in the meantime. The question is one of the materiality or remoteness of the evidence in the particular case.’ ” State v. Kelly, 227 N.C. 62, 64, 40 S.E. 2d 454, 455 (1946).
In the case of In re Will of Hargrove, 206 N.C. 307, 173 S.E. 577 (1934), this Court held that testimony from witnesses concerning testator’s mental capacity to write a will in 1906 was improper when those witnesses first became acquainted with testator at times ranging from two to twenty years after execution of the will. These times were too remote from the time in issue. The reasoning of Hargrove is applicable here. The most recent occurrence about which the defendant wanted to offer testimony was seventeen years prior to the death of Mary Hamer. We hold that this testimony involved defendant’s mental condition at times too remote to have any probative value regarding the existence of any mental disease or defect at the time in issue in the case sub judice.
In any event, Dr. Harper did testify that defendant has a history of being in and out of mental hospitals since he was fifteen. Dr. Harper testified that, “[i]n a great many of these hospitals he received diagnoses compatible with disturbances in *12his acting pattern of the things he was doing. In some of the other hospitals he received diagnoses of chronic undifferentiated schizophrenia, which would fit in with my own examination and my own observation.” With this testimony in mind, the excluded testimony regarding specific events and attitudes of the defendant during his childhood and again at age 30 add nothing of probative value to this case. This assignment of error is overruled.
 Defendant’s fourth assignment of error is that the trial judge improperly refused to allow Dr. Harper to restate on redirect examination his opinion regarding defendant’s mental illness. This question sought merely repetitious testimony and thus was properly excluded. Spivey v. Newman, 232 N.C. 281, 59 S.E. 2d 844 (1950).
Defendant was not seeking to clarify testimony which had been cast into doubt upon cross-examination, to clarify new matter brought out on cross-examination, or to refute testimony elicited on cross-examination as was the case in State v. McKeithan, 293 N.C. 722, 239 S.E. 2d 254 (1977) and State v. Cates, 293 N.C. 462, 238 S.E. 2d 465 (1977). Indeed, on cross-examination Dr. Harper stated the very same opinion he had given during the direct examination that he felt defendant had a mental illness. On cross-examination he went further and stated that despite this mental illness he felt defendant nevertheless knew the difference between right and wrong. Defendant had no additional testimony concerning this latter opinion to bring out on redirect examination. He merely wanted Dr. Harper to state for at least the third time that defendant had a mental illness. The jury was fully aware of Dr. Harper’s position in this respect. This assignment of error is overruled.
Defendant complains in his second and third assignments of error that Dr. Robert Rollins, the psychiatrist who examined the defendant when the trial judge referred him to Dorothea Dix Hospital for evaluation, could testify for the State only in response to a hypothetical question and could not give his opinion based on personal knowledge since he was not a treating physician.
At the points in the record where defendant took exceptions to Dr. Rollins’ testimony relating to his second assignment of error, Dr. Rollins did not give an opinion based on his personal *13knowledge. He was giving background or foundation facts concerning his examinations and observations of and conversations with the defendant. This and other such testimony will be examined below under defendant’s sixth assignment of error. Defendant’s second assignment of error is overruled.
 At the points in the record where defendant took exceptions relating to his third assignment of error we need only note that defendant’s motions to strike this testimony were in fact allowed by the trial judge. We find no prejudicial error in the fact that the jury actually heard the answers since they were instructed at the beginning of the trial not to consider the answer of any witness when a motion to strike was allowed. The trial judge referred to this instruction when, during the trial, the motions to strike were allowed. Although, this was not prejudicial error, we note that the better procedure is to give the instruction to disregard the answer immediately after allowing the motion to strike. State v. Lyles, 298 N.C. 179, 257 S.E. 2d 410 (1979); State v. Greene, 285 N.C. 482, 206 S.E. 2d 229 (1974); Moore v. New York Life Insurance Co., 266 N.C. 440, 146 S.E. 2d 492 (1966). This assignment of error is overruled.
 The district attorney asked Dr. Rollins on at least twenty-five occasions if he had an opinion based on his personal knowledge (obtained as a result of his examinations of and conversations with the defendant) as to whether defendant knew the difference between right and wrong or understood the nature and quality of his acts on 8 February 1979. The trial judge sustained defendant’s objection each time the question was asked. Defendant argues that it was prejudicial error for the trial judge to allow the same question to be asked so many times. This constitutes defendant’s eighth assignment of error.
Dr. Rollins was an expert who had personally examined the defendant. He was qualified to give his opinion on this question based on his personal knowledge (and not based on assumed facts set forth in a hypothetical question). State v. DeGregory, supra. This remains true even though the opinion would have been based in part on conversations he had had with the defendant. We find a sufficient indication of reliability in the thorough and professional examination conducted by Dr. Rollins to warrant admitting the opinion under State v. Wade, supra. This is true because *14in the questioning it was revealed that Dr. Rollins had taken into account the entirety of what defendant said together with his own interpretation and analysis of it and the objective manifestations that accompanied it. On at least some of the occasions, the question was asked in a sufficiently proper form so that Dr. Rollins should have been allowed to state his opinion.1 Thus, it was error favorable to the defendant for Dr. Rollins not to be allowed to give his opinion. This assignment of error is overruled.
In his sixth assignment of error, defendant maintains that since Dr. Rollins was in fact not allowed to state his opinion, it was prejudicial error to allow him to state the basis for and give the background or foundation facts for his opinion.
[7, 8] The general rule is that when the facts are within the expert’s personal knowledge, he may relate them first and then give his opinion; or, within the discretion of the trial judge, he may give his opinion first and leave the facts to be brought out on cross-examination. State v. Abernathy, supra; Stansbury, supra § 136 and cases cited therein; 31 Am. Jur. 2d Expert and Opinion Evidence § 38 (1967) and cases cited therein. Relevant facts may be testified to by an expert or any other witness even if ultimately the expert is not allowed to state his opinion or conclusion concerning those facts.
 However, the situation is different where conversations between physician and patient are involved. In this instance, the expert should not recount the content of those conversations to show the basis for his opinion unless his opinion is admissible into *15evidence. The content of those conversations is not substantive evidence. The first issue when an opinion is based in whole or in part on conversations with the patient or others is the admissibility of the opinion (the reliability requirement.) If the opinion is admissible, then the expert may recount the content of those conversations to show the basis for his opinion. State v. Wade, supra.
 Two routes are available in this situation. First, the expert may testify as to the background facts (other than the content of conversations) first and then give his opinion followed by testimony concerning the content of the conversations upon which his opinion is also based in whole or in part. If the opinion is not admitted, the conversations may not be recounted to the jury. Second, a voir dire hearing may be conducted. At the conclusion of this hearing, the trial judge will make his ruling on the admissibility of the opinion. If he rules it inadmissible, the expert may still testify as to any relevant facts within his knowledge but may not relate conversations he had with the patient unless there is an applicable hearsay exception. If the only justification for admitting the conversations is to show the basis for his opinion, obviously this justification is absent where the opinion may not be given. If the opinion is ruled admissible at the conclusion of the voir dire hearing, then the order of facts, conversations and opinion does not really matter since there is no danger of the conversations coming into evidence as the basis for the expert’s opinion without the opinion also coming into evidence.
 Here, it was not error for all of the facts, other than the content of the conversations, to come into evidence even though Dr. Rollins was not allowed to give his opinion. It was error for the conversations to come in but on the facts of this case the error was non-prejudicial since substantially the same information came into evidence when defendant testified in his own behalf and when his confession was admitted into evidence. This is the same information that defendant told to Dr. Rollins during his examinations of the defendant that Dr. Rollins recounted to the jury during the trial. Since there was no prejudicial error, this assignment of error is overruled.
 Defendant’s fourteenth assignment of error is that there is insufficient evidence to support the trial judge’s findings of fact and conclusion of law that his confession was admissible.
*16The evidence does support the finding that defendant was advised of his Miranda rights at a rest stop on the trip from Maryland to North Carolina. No questioning occurred before defendant was advised of his rights. After being so advised defendant signed a written waiver of rights form. In response to questioning, he did not implicate himself in the killing of Mary Hamer. The questioning then stopped. Three to five hours later, defendant initiated the conversation in which he admitted that he strangled Mary Hamer. There is evidence to support the findings and the findings support the conclusion that this confession was not the result of interrogation but was “knowingly, intentionally, freely and voluntarily, spontaneously” made. This assignment of error is overruled.
 By his ninth assignment of error, defendant contends that the trial judge erred in refusing to sustain his objection to a portion of the district attorney’s closing argument and to instruct the jury to disregard those remarks.
Prior to trial, a ruling was made upon defendant’s motion in limine to restrict the remarks of the district attorney during the jury voir dire and the trial. The applicable portion of the order is as follows:
“It Is Therefore Ordered that the District Attorney is hereby prohibited, during the course of the jury voir dire and trial, from making any reference, directly or indirectly, to any of the following matters, separately or severally:
3. References to the fact that if the defendant is found not guilty by reason of insanity at the time the offense was committed but is found presently sane, that the defendant would not be incarcerated but would be legally free.”
The complained of portion of the district attorney’s closing argument is as follows:
“You might be satisfied that had it not been for him being mentally ill or suffering from a mental defect that he might not have killed Mary Hamer; a causal relationship, but for, had it not been for this mental disease or mental defect this *17would not have happened, the death of Mary Hamer. You might go back there and be satisfied of that and you might say that’s the reason he did it. The reason he killed Mary Hamer was because he was mentally ill.
Ladies and gentlemen, that’s not enough. I say that you might find that because there seems to be no other explanation as to why he killed her but that is not enough. If you’re satisfied that there is a causal connection, again, you must find that he did not know the difference between right and wrong or did not understand the nature and quality of his act.
[You might not think that’s a fair law. You might agree with it. You might think that if a person kills somebody because they are mentally ill that they ought to be able to walk out the door and be put back out on the streets; but you are obliged to follow the law and that’s what the law says and I’m sure that you will follow the law.]
MR. Heidgerd: Objection and motion to strike that statement.
Exception No. 108.”
This argument is not in violation of the pretrial order because the argument does not refer to the consequences of being found not guilty by reason of insanity. It refers to the consequences of finding that the defendant has a mental illness. That alone is not enough to make out the defense of insanity. The defense is not complete unless the mental illness causes the defendant to not know the nature and quality of his acts or, if he does know his actions,- to not know the difference beween right and wrong. This argument was especially pertinent for the State to make in the light of Dr. Harper’s testimony that defendant had a mental illness but still knew the nature and quality of his actions and knew the difference between right and wrong. This assignment of error is overruled.
 Defendant’s tenth assignment of error is that the trial judge was obligated to define “satisfaction” after instructing the jury that defendant had the burden of proving insanity to the satisfaction of the jury.
*18The trial judge instructed the jury in relevant part as follows:
“If you find from the evidence beyond a reasonable doubt that the defendant choked or strangled Mrs. Hamer, you must then determine if the defendant was insane when that act occurred. In regard to this question the defendant has the burden of proving insanity. However, he need not prove this beyond a reasonable doubt but he need prove it, if at all, only to your satisfaction.”
Defendant requested that “satisfaction” be defined as follows:
“To the satisfaction of the jury simply means such evidence as satisfies the jury of the truth of the matter and the jury alone is the judge of its satisfaction.”
This instruction would have added nothing whatsoever to what the jury was told since defendant défines “satisfaction” as “such evidence as satisfies.” The jury knew that what satisfied it was for its own determination and, from the trial judge’s instructions, the standard is less than the reasonable doubt standard. The jury is presumed to have understood the plain English contained in Judge Smith’s instructions. This assignment of error is overruled.
 By his eleventh assignment of error, defendant contends that the trial judge erred in refusing to give a certain requested instruction on the defense of insanity.
The trial judge instructed the jury virtually verbatim from defendant’s request except he left out that portion of the request that is enclosed in brackets:
“Now I instruct you that sanity or soundness of mind is the normal condition of men. Therefore the law presumes that everyone is sane until the contrary is made to appear. The defendant in this case would be insane if, at the time of the alleged crime and as a result of mental disease or defect, he either did not know the nature and quality of his act or did not know that it was wrong. Thus, the mere existence of a mental disease or defect is not sufficient. The disease or defect, if any, must have so impaired the defendant’s mental capacity that he either did not know the nature and quality of his act or he did not know that it was wrong.
*19On the other hand, it need not be shown that the defendant lacked mental capacity with regard to all matters. A person may be sane on every subject but one but yet if his mental disease or defect with reference to that one subject rendered him unable to know the nature and quality of his act with which he is charged, or know that the act was wrong, then his defense would be complete [for he was not responsible for his acts and he is not guilty of any offense against the law as guilt arises from the mind and wicked will. Criminal intent, of course, is an essential element of murder, and if by reason of insanity or mental disease a person is incapable of forming any intent, he cannot be regarded by the law as guilty.]
So I charge you that if you’re satisfied that the defendant was insane at the time of the choking or strangulation of Mary Hamer, he would not be guilty by reason of insanity, and that would end the case.
However, if you were not satisfied, then you would be required to determine whether he was guilty of first degree murder, second degree murder, voluntary manslaughter; or whether he is in fact not guilty of that offense.”
While the portion of the above instructions that is enclosed in brackets is a correct statement since a similar instruction with a reference to criminal intent was approved in State v. Bracy, 215 N.C. 248, 1 S.E. 2d 891 (1939), overruled on other grounds, State v. Hammonds, 290 N.C. 1, 224 S.E. 2d 595 (1976), its omission in this case was not prejudicial error. It is not clear whether the reference to “criminal intent” is a reference to a specific intent to kill (first degree murder) or is a reference to a general intent to commit the act constituting murder.
If the reference is to a specific intent to kill, then defendant’s position has been expressly rejected by this Court. State v. Harris, 290 N.C. 718, 228 S.E. 2d 424 (1976); State v. Shepherd, 288 N.C. 346, 218 S.E. 2d 176 (1975) (no error in the trial judge’s failure to instruct the jury as to the effect of insanity or mental weakness on premeditation and deliberation which includes a specific intent to kill). See also, State v. Cooper, 286 N.C. 549, 213 S.E. 2d 305 (1975) in which we found no reversible error in the trial judge’s refusal to instruct that a mental deficiency or disease *20could prevent a defendant from forming a specific intent to kill which is required for a conviction of first degree murder by premeditation and deliberation. There was no error because, as is true in the case sub judice, the jury found the defendant guilty of first degree murder. The jury, by its verdict, established that the defendant, at the time of the alleged offenses, had the mental capacity to know right from wrong with reference to these acts. It requires less mental ability to form a specific purpose to do an act than to determine its moral quality. Since the jury found, by its verdict, that the defendant had this greater mental capacity (the ability to know right from wrong) it necessarily follows that he had the lesser included mental capacity (the ability to form a specific intent to kill). Id.
We held in State v. Shepherd, supra, that we have not adopted this theory of diminished mental responsibility. In this State the test for insanity which is a complete defense to a criminal charge is,
“whether the accused, at the time of the alleged act, was laboring under such a defect of reason, from disease or deficiency of the mind, as to be incapable of knowing the nature and quality of the act, or, if he does know this, was, by reason of such defect of reason, incapable of distinguishing between right and wrong in relation to such act.” State v. Jones, 293 N.C. 413, 425, 238 S.E. 2d 482, 490 (1977); accord, State v. Pagano, 294 N.C. 729, 242 S.E. 2d 825 (1978); State v. Willard, 292 N.C. 567, 234 S.E. 2d 587 (1977); State v. Harris, supra; State v. Hammonds, supra; State v. Cooper, supra; State v. Humphrey, 283 N.C. 570, 196 S.E. 2d 516, cert. denied, 414 U.S. 1042 (1973); State v. Johnson, 256 N.C. 449, 124 S.E. 2d 126 (1962).
If the reference to “criminal intent” in the above requested instruction is a reference to a general intent to perform the act constituting murder, then clearly there was no error in omitting this part of the request. It appears from the context of the entire requested instruction that it is a reference to a general intent because the requested instruction reads that if that intent is absent and the “person is incapable of forming any intent, he cannot be regarded by the law as guilty.” In other words, if the intent to commit the act constituting murder is absent defendant is not *21guilty of any offense. The insanity instruction as given fully explains this point to the jury.
The jury was fully and adequately instructed regarding the definition of insanity in this State, the burden of proof on the defense, and that it is a complete defense resulting in a verdict of not guilty by reason of insanity. If one does not know the nature and quality of his acts or does not know the difference between right and wrong, then, by definition, he does not have a criminal intent. This assignment of error is overruled.
Defendant has abandoned assignments of error numbers seven, twelve, thirteen, fifteen and sixteen since he did not bring them forward and argue them in his brief. Rule 28(a), (b)(3), Rules of Appellate Procedure.
Defendant was “entitled to a fair trial but not a perfect one.” Lutwak v. United States, 344 U.S. 604, 619, 97 L.Ed. 593, 605, 73 S.Ct. 481, 490 (1953); accord, State v. Hough, 299 N.C. 245, 262 S.E. 2d 268 (1980). Defendant received a fair trial free from prejudicial error and we find