Tying shoe laces's

http://lifehacker.com/5636564/watch-a-demonstration-of-the-worlds-fastest-shoelace-knot

Dammit Im mad is a palindrome!

"Dammit Im maD" is a palindrome :-)
Sweet!!!

Q.E.D.

I saw this after many proofs but always assumed it meant "hence proved" or something and did not bother to look into the real abbreviation.


I finally looked it up and found that it stands for "Quod Erat Demonstrandu" which in Lating means "which was to be demonstrated"