Penny
You know, I gotta ask; why didn't you just get a license at 16 like everybody else?
Sheldon
I was otherwise engaged.
Penny
Doing what?
Sheldon
Examining perturbative amplitudes in N = 4 Supersymmetric Theories, leading to a re-examination of the ultraviolet properties of Multi-loop N = 8 Supergravity using modern Twistor Theory.
Penny
Well, how about when you were 17?
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