How many cats can one own before they become "the crazy cat lady"?

Update: (I knew at least one person would say just one, but they are the kind of people that probably keep cockroaches in a jar as pets)
Update 2: The person in question is early/mid-20s, living with someone in an apartment.
Update 3: My personal limit especially for an apartment is two. But that may be because I had two cats sharing an apartment for over twelve years that never got along with each other. Fur & spit was always flying.
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