Sentence examples similar to a valid ring from inspiring English sources

Depending on one's chosen taxonomic criteria, whether these candidate barriers affect taxa that presently constitute valid ring species or, more generally, ring distributed taxa in which terminal forms are above or below species-level divergence, is a question that can now be addressed.

A valid enough excuse.

That is a valid point.

Is that a valid argument?

It's a valid question.

I had a valid passport.

"A valid point," Alec said.

It's a valid point.

They make a valid point.

It is a valid concern.

He made a valid argument.