They would interview me for an hour, plainly not knowing what to think of me.

"Because I should like to know plainly what his intentions are."

Whoever was in charge of them plainly knew his business.

Rees plainly knew even more than the very large amount he publicly revealed.

No signs of struggle, so they plainly knew the assassin.

An English teacher who "plainly knew that poetry mattered like blood or money" influenced him.

Well, you plainly know now what the Whisperer's voice sounds like.

The noncoms in the platoon all plainly knew as much.

Behind him were several guards who plainly knew their business.

And yes, he thought, humans plainly knew plenty about water.