[extropy-chat] HISTORY: Solved & Unsolved Riddles

[scerir]

> The question, then, looks like a cognitive optical illusion, and one that
> has no counterpart we can readily draw upon for analogy. [...]
> Damien Broderick

There is a similar (???) problems now in physics.
There are effects involving a probability > 0
There are - it seems so - effects involving a 
probability < 0 (negative!). (Well, Feynman
started this thread).