As a mathematician, it's probably worth pointing out the use of the implication. "If you are planning on bombing them tomorrow at 5pm then why wait?" is not equivalent to "Russia should be bombed now."

And indeed, of all the logical fallacies I see on the Internet this is one of the ones that tends to bother me personally the most. "A -> B" is not! equivalent to "B". If I meant B, I would have simply said B. I suspect the same is true of von Neumann.