Opinion of the Court
EFFRON, Judge:At a general court-martial composed of officer and enlisted members held at Fort Stewart, Georgia, appellant was convicted, contrary to his pleas, of making a false official statement, assault consummated by a battery (2 specifications), and committing indecent acts, in violation of Articles 107, 128, and 134, Uniform Code of Military Justice, 10 USC §§ 907, 928, and 934, respectively.1
The members sentenced appellant to a dishonorable discharge, confinement for 6 months, total forfeitures, and reduction to the lowest enlisted grade. The convening authority approved the sentence, and the Court of Criminal Appeals affirmed in a unanimous unpublished opinion.
We granted review of the following issue:
WHETHER THE “EXCULPATORY-NO” DOCTRINE BARS PROSECUTION UNDER ARTICLE 107, UCMJ, FALSE OFFICIAL STATEMENT, FOR MERELY DENYING MEMORY OF EVENTS INQUIRED INTO BY CRIMINAL INVESTIGATORS.
In a recent opinion issued subsequent to our grant of review in the present case, we held that the “exeulpatory-no” doctrine does not bar prosecutions under Article 107. United States v. Solis, 46 MJ 31 (1997). While that decision normally would have been disposi-tive of the granted issue, our consideration of the evidence related to the granted issue has convinced us that the evidence is legally insufficient to sustain the finding that appellant’s statement was a false official statement. See Jackson v. Virginia, 443 U.S. 307, 319, 99 S.Ct. 2781, 2788, 61 L.Ed.2d 560 (1979).
I
In a prosecution under Article 107, the Government must prove that the accused made an official statement; that the statement was false; that the accused knew it was false when he made it; and that he made it with an intent to deceive. See para. 31b, Part IV, Manual for Courts-Martial, United States (1995 ed.). The false-offieial-statement specification, as found by the members, stated that appellant,
did, ... on or about 18 August 1993, with intent to deceive, make an official statement, to wit: I don’t remember doing it (roughhousing with the girls[,] could you have touched them on the breast?), which statement was totally false, and was then known by [appellant] to be so false.[2]
This allegedly false statement was made during an interrogation by agents of the Criminal Investigation Command that took place more than a year after the events under investigation allegedly occurred. The Government thus was obligated to prove not only that appellant did, in fact, remember the referenced details of events that occurred *148more than a year prior to the interrogation, but also that when appellant said he did not remember, he knew he was lying and that he lied with intent to deceive government officials.
II
The question of what constitutes the “truth” has challenged philosophers throughout the millennia of recorded history. Although our judicial responsibilities do not obligate us to engage in philosophical discourse, we are required to determine whether a person convicted of making a “false” official statement has uttered words that, under applicable legal principles, can be determined to be untrue for purposes of the law.
In order to prove that a statement is “false” under Article 107, the Government must introduce two different types of admissible evidence: First, evidence to prove the content of the statement in question; second, evidence to prove other matter that so clearly contradicts the challenged content of that statement that a rational factfinder would be convinced beyond a reasonable doubt that the other matter is true and the challenged statement is false.
The content of an allegedly false official statement made during an interrogation normally involves a statement as to the occurrence or non-occurrence of an observable set of circumstances. For example, the challenged statement might consist of an alibi, the specific details of an event, a denial that the accused participated in an event, or a denial that the accused participated in the manner alleged. In any such case, the Government must introduce not only the pertinent content of the accused’s statement, but also additional evidence to clearly contradict the accused’s statement. Typically, this second type of evidence consists of facts that, for example, would contradict an alibi, set forth different details of an event, or otherwise counter an accused’s denials.
When the pertinent content of an accused’s statement is an assertion that he “does not remember” a specific act or details of an event, as in this case, it is not sufficient for the Government to introduce evidence of the occurrence or non-occurrence of the act or event that is the subject of the statement. The issue in this case is the existence or nonexistence of memory of the act rather than whether the act itself occurred. Accordingly, the Government in this framework must introduce evidence proving that appellant did, in fact, have such a clear memory of the act or details of the event in issue that he was obligated to provide that information when asked about it during an official interrogation.
We are unaware of any objective test to definitively establish that an individual actually remembered a specific fact when the individual denies memory of it. There may well be situations where the Government can offer sufficient circumstantial evidence to prove, for purposes of Article 107, that the accused lied about the existence of this memory. Such circumstances might include a contemporaneous statement of memory, a subsequent admission that the denial of memory was a lie, or proof that the matter under inquiry involved a military duty of such significance that it would be implausible for the accused to not remember the details. We reserve judgment as to whether any such evidence would be sufficient in a particular case.
This, however, is not such a case. The relevant events occurred off-duty, more than a year prior to the interrogation. During questioning, appellant specifically denied the alleged participation in rape, consensual sexual intercourse, and a variety of related details. He acknowledged that he, his son, and his younger brother had engaged in “roughhousing,” including wrestling, with two young girls, both at a playground and in his back yard. During questioning, he was asked whether he had pinched the girls on the breast, and he responded, “No.” He then was asked the question that formed the basis for the false-statement conviction: ‘When roughhousing with the girls[,] could you have touched them on the breast?” He responded: “I don’t remember doing it.”
*149Unlike the question about pinching, which clearly directed appellant’s attention to specific, inappropriate behavior, this question about touching was vague and used speculative wording rather than definitive terms. In the context of an interrogation about very serious alleged sexual misconduct and in view of the sequence of the questions and the speculative nature of the second question, it is understandable why appellant, who acknowledged wrestling and roughhousing with the girls, was not prepared to speculate as to the possibility of any touching, including innocent or inadvertent touching.
In a statement made during an interrogation 5 days later, on August 23, appellant was asked directly about the act of pinching. Although he had responded to a similar question by saying “no” on August 18, on August 23 he acknowledged that he had pinched one of the girls on the breast. The interrogation, however, contained no follow-up question that asked him to address the basis for his August 18 statement regarding his lack of memory of any touching.
During an interrogation on August 24, appellant stated: “Up to this point, I have denied any kind of physical contact which could be interpreted as sexual because I was afraid of going to jail based on her statement.” The August 24 statement, however, concerned other aspects of the allegations and did not address the alleged pinching or other touching of the victim’s breast. Moreover, and more importantly to this appeal, it did not contain any follow-up questions regarding potential discrepancies between the August 18 and August 23 statements; and there were no inquiries relating to appellant’s denial of memory on August 18.3
Ill
This case might have come to us in a very different posture. For instance, for reasons that are not apparent from the record, the Government did not charge appellant with making a false official statement on August 18 when he expressly denied the specific allegation of pinching the girls on the breast, an act that 5 days later he acknowledged committing. Inexplicably, the Government instead chose to focus on appellant’s memory of the details of a different event, charging him with making a false official statement when he said on August 18 that he did not remember whether he could have touched the girls on the breast when roughhousing with them.
Moreover, trial counsel, in the Government’s opening statement at the court-martial, assured the members: “Special Agent Seibert will say that in the first interview the accused ... said, T don’t remember if I touched either one of them on the breast.’ And Special Agent Mayoral will tell you that the accused came in later and said, “Well, I may have touched them. I probably touched them. We were roughhousing. I probably touched them.’ ”
No such testimony was ever produced at trial. Neither agent testified as to the content of appellant’s statements. When called, the agents simply discussed procedure, including the fact that they prepared and typed the statements, which appellant reviewed and signed. The Government simply introduced these written pretrial statements, neither of which clearly contradicted appellant’s statement that he did not remember certain details of an off-duty event occurring more than a year before his interrogation that only tangentially was related to an investigation of much more serious alleged misconduct.
IV
This appellant was interrogated after being advised that he was suspected of charges including rape, which carried a potential sentence of life imprisonment. See para. 45e(l), Part IV, Manual, supra. During the interrogation, investigators asked a question that, in context, reasonably could have been interpreted by appellant as making a general and speculative inquiry about an ancillary matter occurring more than a year before the interrogation, not involving any military duly. *150Given the circumstances of this case and the context of the specific questions, we are satisfied that appellant’s statement that he did not remember certain details was reasonable. At no time during subsequent interrogations did the investigators raise any questions about his denial of memory. The Government promised in its opening statement to produce testimony that directly would have contradicted appellant’s denial of memory, but it failed to offer such testimony.
The issue in this case is not whether appellant is guilty of the battery of pinching a young girl; he was convicted of that offense, and we have not altered that finding on appeal. The issue, moreover, is not whether he made a false official statement when he denied the act of pinching; the Government had the opportunity to prosecute him for making two potentially contradictory statements but chose not to do so.
Instead, the issue is whether, under the circumstances of this case, appellant made a false official statement under Article 107 when, in response to a vague and speculative question, he said that he could not remember certain specific details of an off-duty, off-post event that occurred more than a year before an official inquiry into relatively much more serious misconduct. Based upon our review of the record, we hold that the Government failed to introduce evidence upon which a rational court-martial panel could conclude that this statement was false.4
Thus, the evidence is legally insufficient to sustain this conviction. In view of the significant offenses of which appellant remains convicted and in view of the sentence, we hold that this error is not prejudicial as to sentence.
V
; The decision of the United States Army Court of Criminal Appeals is reversed as to Charge I and its specification. The findings of guilty thereon are set aside, and Charge I is dismissed. In all other respects, the decision below is affirmed.
Judge CRAWFORD concurs.
. The members acquitted appellant of rape, carnal knowledge, kidnapping, and adultery, violations of Articles 120 and 134, Uniform Code of Military Justice, 10 USC §§ 920 and 934, respectively.
. The false-statement specification, as referred to trial, stated that appellant "did ... on or about 18 August 1993, with intent to deceive, make an official statement, to wit: I never took either of the girls into my bedroom. When they came into the house it was both of them in the house together; I couldn’t tell you (if the name ‘titty twister’ came up); and I don’t remember doing it (roughhousing with the girls [,] could you have touched them on the breast?), which statement was totally false, and was then known by [appellant] to be so false.” The members found appellant guilty of only that portion of the statement involving a denial of memory.
. The investigators’ lack of attention to the August 18 denial of memory is understandable. They were investigating an alleged rape, and the question of the suspect’s memory of an ancillary matter likely would not have been of great concern to them.
. For similar reasons, it is problematic whether the Government produced legally sufficient evidence that appellant knew that the statement was false at the time that he made it.