Sentence examples similar to is plainly understandable from inspiring English sources

Many theological and ethical truths (e.g., there is a God, God is to be worshiped, it is good to be just and righteous) are plainly understandable to everyone, and if one is mistaken in these matters "'tis not by his Understanding, but by his Will that he is deceived".

Le Carre's admiration for their struggle is plainly genuine, and his outrage at Western complacency understandable.

He is plainly clever.

"It is plainly illegal.

That is plainly untrue.

It is plainly garbage.

It is plainly counterproductive.

This is plainly false.

This is plainly nonsense.

This is plainly unacceptable.

The operative word is "plainly".