Sentence examples similar to a dubious demeanor from inspiring English sources

Is it a dubious endeavor?

"A dubious distinction," Pooley laughs.

His father, Morris Gershovitz, was a dubious patriarch.

That was a dubious choice of gift.

Again, this is a dubious claim.

It seems a dubious proposition.

It's a dubious argument.

Bobby Cox set a dubious record.

That is a dubious proposition.

This seems a dubious idea.

A dubious alliance between Zimbabwe and Iran.