Steven may have been assisting in a cover-up by promoting implausible theories and cover stories to mislead authorities and the media.

One implausible theory holds that in southern Africa the word was originally used by the Zulu King uShaka to refer to the white settlers as "amakhafola" meaning people that have been spat out, as he thought the settlers were spat out by the sea.

Given the bill's vague criteria, some critics alleged that this requirement could be used to force faculty to cover implausible theories in their classes.

This is not an implausible theory.

Such an idea is based on an implausible theory: Homer's originality was such that he foresaw the importance of writing.

Torene listened and wondered if she ought to report some of the more implausible theories to the Weyrleaders.

If most absolute records have been improving, then shouldn't we assume that athletic prowess has risen in baseball as well: Wouldn't we be denying a general pattern and creating an implausible, ad hoc theory if we attributed the extinction of 0.400 hitting to a decline in batting skills?

Other historians, however, find the theory implausible, in view of the slope of the land.

Many scientists outside the company found that theory implausible, and a rush to examine Vioxx, as well as Celebrex, began.