[dperny]

I've known the answer to the Monty Hall problem for a long time, but this particular explanation just so happens to be the first one that's brought me closer to grokking the answer. I dunno what's different about this one, but it makes sense to me. Congrats.

[BerislavLopac]

I think that the key sentence in his explanation is "So now Set B still has a 2/3 probability of having the prize." This really nails the whole thing down.

[chrismcb]

One thing to keep in mind, that most people don't understand, this only works if someone KNOWS which one is empty, and shows the door.