Two young men argue among racks and long boxes in a comic-book shop, one with folded arms in a superhero T-shirt, the other gesturing in a dickey and vest.

Original artwork, not a still

Sheldon Cooper

I'm not crazy. My mother had me tested.

— The Big Bang Theory

Behind the line

What it means

Our interpretation.

The line is the perfect Sheldon defence: a credential offered as proof, when everyone around him can see the symptoms. It works because it is both a joke about him and a sign he is oblivious to the joke. Fans quote it as a cheerful reply to anyone who calls them odd, usually with a shrug.

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In context

Spoilers for The Big Bang TheoryShow the scene

Whenever someone calls Sheldon Cooper crazy, this is his stock reply. A clear instance comes in "The Jiminy Conjecture" (season 3, episode 2, first aired on 28 September 2009): Sheldon is arguing with Howard over comic-book facts about Wolverine, Raj tells Howard to give up because he is arguing with a crazy person, and Sheldon answers that he is not crazy and his mother had him tested. The gag keeps returning for years; his mother Mary later confirms she did, adding that she wishes she had followed up with a specialist in Houston.

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