The two papers are tenable theories on bending or distorting light to electromagnetically conceal an object.

I ask you now, is such a theory tenable?

It did not even present itself to me as a tenable theory that the book might have been left behind on purpose, as being of no further use to the owner.

It is proposed to do such investigation, with the hope that, even should the hypothesis thus be overthrown, such research may lead to a tenable theory.

At least it is a far more tenable theory than that we are being sucked into the vortex of an enormous whirlpool.

Concerning the ignis fatuus itself, some hold that it is due to phosphureted hydrogen gas - a tenable theory.

It is a tenable theory -" "Come, gentlemen!

I never yet heard any tenable theory propounded regarding the process used, or rather regarding the process and the materials employed.

That could be a more tenable theory, Captain.

On the basis of the assumptions I began with, it is a tenable theory, worthy to be tested, that this was the same man.