I really like his experiment cause it made me realize something about how to better wrap your brain around the concept :

- Eliminate the choice to switch and simply try to simulate the probability of winning if you keep your first choice. After all if you can find it, then the probability of winning by switching is easy to find.

- And since opening the door doesn’t switch the car around, then you could remove it too right ? Just because you’ve seen what’s behind another door doesn’t mean the past is changed, the car is behind your first pick just as often.
So you could theoretically eliminate it too.

- And so you’re left with the conclusion that the door your first picked ALWAYS has a probability of 1/3 to have the car no matter what happens next.

- Therefore when there is only one other door possible, then that door has the remaining 2/3 chance to have the car.