Most middle-class whites have no idea what it feels like to be subjected to police who are routinely suspicious, rude, belligerent, and brutal.

I've walked away in the middle of a conversation and had no idea that was wrong until someone told me I was being rude.

I misdirect the audience, so they have no idea where they are or who they're listening to.

If someone is very upper-class, you have a stereotype of him which is probably true. If someone has a working-class accent, you have no idea who you're talking to.

We didn't have any idea of what was going on. We had no idea.

I have no idea.