Even the most reputable investigators have been unconvincing.
President Obama and his advisers have reacted to these disclosures through a series of unconvincing gyrations.
Everything seemed too hackneyed or unconvincing or simply impossible.
This is the usual defense that these companies make and I just find it completely shallow and unconvincing.
The Ryan-Romney ticket has its answers, contrived and unconvincing.
The man had been accused of stealing and assault, but the evidence was unconvincing to Gaston.
Yet he somehow felt that his laugh was feeble and unconvincing.
Then, too, in view of the difficulty of judging the effects of medicines in tuberculosis, the clinical data were unconvincing.
The fault that most people will find with this story is that it is unconvincing.
Marshall's effort to square this previous opinion with his later position was as unconvincing as it was labored.