Everyone knows …
Everyone I know thinks …
Everyone’s doing …
It’s easy and common to think this way (dare I say everyone does?), but everyone’s “everyone” is different.
It’s often useful to know what “everyone” thinks — they might be right about the new movie, or music, for instance.
But there’s a lot that everyone doesn’t know, or on which they might be wrong. And it pays to know when “everyone” merely knows what you know.