Item 2 (0140) — The Clowder Project

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Style	Class	Font	Theorem Environments
Style 1	`book`	Alegreya Sans	`tcbthm`
Style 2	`book`	Alegreya Sans	`amsthm`
Style 3	`book`	Arno*	`amsthm`
Style 4	`book`	Computer Modern	`amsthm`

*To be replaced with Linus Romer's Elemaints when it is released.

Two-Out-of-Three. Let

be a diagram in $\mathsf{Cats}$. If two out of the three functors among $F$, $G$, and $G\circ F$ are equivalences of categories, then so is the third.

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