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So, I'm studying Category Theory, and I'm stuck with some questions. One of them is this one:
Can a functor $F:A \to B$, meaning, a functor $F$ from category $A$ to category $B$, have an image that is NOT a subcategory of $B$?
I can't really find a situation where this happens, but by my readings this is wrong of my part.
Thanks in advance.