I am trying to remember where this famous example in probability comes from, but i can only remember bits and pieces of it:
-There is something behind one of several doors
-when you open one of the doors, and find nothing, it changes the chance of further hits in a non-intuitive way.
-Erdos famously took a long time to get it.
Ring a bell for anyone mathematically inclined out there?
Thanks in advance,
JB
"How does a photon decide to reflect at an air-glass surface? It's a mystery." -Feynman, QED
"I am finally stopped getting dumber" - Erdos epitaph he requested. :)