Bob does not know X. That’s why Alice is telling Bob in the first place.
Conversational phrases aren’t supposed to be interpreted literally. “Everybody knows” never means “literally every single person knows”. This is about equivalent to complaining that people say “you’re welcome” when the person really wouldn’t be welcome under some circumstances.
Don’t be the literal Internet guy who thinks this way.
Sometimes being overly literal is a useful way to point out hidden assumptions/inferences that the interlocutor attempted to sneak into the conversation (whether consciously or subconsciously).
Conversational phrases aren’t supposed to be interpreted literally. “Everybody knows” never means “literally every single person knows”. This is about equivalent to complaining that people say “you’re welcome” when the person really wouldn’t be welcome under some circumstances.
Don’t be the literal Internet guy who thinks this way.
Sometimes being overly literal is a useful way to point out hidden assumptions/inferences that the interlocutor attempted to sneak into the conversation (whether consciously or subconsciously).