Monty Hall

http://www.marilynvossavant.com/articles/gameshow.html

Haha think this is so amazing in so many ways.

I knew this old problem was kinda confusing.. but I didn't know the solution was elusive enough to stumble thousands of people with Phds. And I think it shows us how we trust our instinct too much. I'm sure if these people who accused Marilyn Vos Savant of being wrong had worked out the solution from ground zero and not relied on what their intuition was telling them, the answer would have been very clear to them.