Insert funny post title or obscure reference here

I just found a quote I really like:

"If two people were exactly alike, one of them wouldn't be necessary."

I found it at this page while trying to find the meaning of the word "dem" (as in "A dem fine woman", a line from The Magician's Nephew by C. S. Lewis). For the curious out there, yes, it's a British-type slang form for a word I'm sure you've already guessed.