The 50-50-90 rule: Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.
Question #85 posted on 09/03/2003 midnight
Q:

Dear 100 Hour Board,
Could the dinosaur in the Science Center support the weight of 2 or 3 people?
- wondering

A: Dear wondering,
Don't even think about trying it. The powers that be wouldn't be happy.
-Rufus