implausible

It is very difficult to sit by helplessly while a friend is imprisoned for a crime that is too implausible to comprehend.

The allegation may or may not be true, but it is not implausible.

But it is implausible at best to suggest that nothing is better than something.

It seems highly implausible that the Chuck Todd Effect will ultimately decide the McConnell/Grimes sprint to the finish.

A dark-skinned man and light-skinned woman stand among a crowd, clothed chimpanzees in each of their arms—an implausible family.

This was no implausible ground for imagining that his death had some other cause than the yellow fever.

Opportunism has been characterized by the avid acceptance of wholly implausible doctrines, or by a disingenuous "realism."

Third, you print stories that give a weak and implausible scientific basis.

Larry recognized that his statement had sounded most implausible.