What was as yet a mere hypothesis, would become a starting point to act upon.

This was mere hypothesis, since Gaskell had no contact with Brontë after her marriage.

This is, as yet, a mere hypothesis, to be tested empirically without any preconceptions.

But this is not a matter of mere hypothesis, he argues, but historical fact.

In the case of Galileo, it was the mere hypothesis that the earth revolved around the sun.

As of 2013 there is no experimental evidence of time travel, making it a mere hypothesis as opposed to an empirical fact.

The rest was just guesswork, mere hypotheses.

Evolution is no longer a mere tentative hypothesis.

The prospect of greater enlargement is no longer a mere hypothesis, it is not a remote possibility.

It is a mere hypothesis, of course," said the analyst "It can be nothing more at this early stage of analysis.