> is so very simple Years ago, when the Monty Hall problem was not well known, I've seen with my own eyes that it was hard to convince some very smart people o

> is so very simple Years ago, when the Monty Hall problem was not well known, I've seen with my own eyes that it was hard to convince some very smart people of the correct answer. Indeed, after being convinced through simulation or exhaustive enumeration of the decision tree or some other way, they would go back and see what went wrong with their initial analysis.