In a 2016 assessment by Alex Wellerstein, the nuclear historian asserts that the truth of the Copenhagen meeting is that "we’ll never know, and it probably isn’t that important in the scheme of things". Nevertheless, he argues that Frayn's play creates a false balance in ascribing undue credibility to the theory (rejected by almost all historians) that Heisenberg sabotaged the German nuclear program, a theory Heisenberg did not directly advocate (being misquoted by Jungk) but also did not publicly dispute. The play was accurate in not portraying the Nazis as narrowly failing to obtain the bomb, but there were many other far more plausible reasons for their failure. On the other hand, Wellerstein praised the play for the moral questions it raised and for creating public interest in history.