Formal written English is not the only legitimate form of the language, and the rules of formal written English don’t apply in all situations. Sure, it’s useful to know when to use who and whom, but it’s probably more useful to know that saying To whom did you give the book? in casual conversation will make you sound like a pompous twit.
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Formal written English is not the only legitimate form of the language, and the rules of formal written English don’t apply in all situations. Sure, it’s useful to know when to use who and whom, but it’s probably more useful to know that saying To whom did you give the book? in casual conversation will make you sound like a pompous twit.