unconvincing

The critics have not been kind, with The Guardian calling  A Long Way Down “fantastically unconvincing.”

He found—and still finds, for that matter—the official explanation of the supposed Foster suicide unconvincing.

In essence, the argument would be both unconvincing and counterproductive: Elect us because we made a mistake.

While Baldwin is an unconvincing gay rights activist, he seems to have an ulterior motive in writing this article.

It is exceptionally unconvincing that this is impossible or perennially elusive.

In my puny way, sounding hollow and unconvincing, I try to tell George how foolish he is.

And this assumption of "direction" is unconvincing, if not suicidal in character.

And beyond this, Dr. Tschischwitz's parallels are flatly unconvincing, or rather they promptly put themselves out of court.

To a reader of to-day, his arguments from Shakspere's diction and syntax are peculiarly unconvincing.

Many witnesses testified, and his own testimony was so unconvincing that the jury convicted him without leaving the bench.