"I just turned 30 so I got really introspective as you do, questioning my life. And when I stopped and sort of looked back at the past decade, I realized I had done more work than I thought I had done."

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So the thing I realized rather gradually - I must say starting about 20 years ago now that we know about computers and things - there's a possibility of a more general basis for rules to describe nature.

— Stephen Wolfram