Sentence examples similar to the only valid omniscience from inspiring English sources

Akalaṅka clearly has in mind a typical materialist philosopher who rejects the idea of omniscience, but at the same time accepts perception (pratyakṣa) as the only valid instrument of knowledge, while rejecting the validity of inference (anumāna).

But, suddenly, The Times owns the only valid opinion.

Yet we regard elections as the only valid method.

The only valid argument is that the game in developing countries would benefit from Olympic funding.

The only valid test of a poet's authority lies, of course, in the poem itself.

But Weinberger's abrasive personality left him convinced that his policy was the only valid option.

But he had finally beaten cancer by the only valid criterion.

Is the only valid resentment in America that of white males?

Randomised controlled trials are not the only valid form of impact evaluation.

Or is the only valid opinion on this matter your own?

Are these the only valid alternatives?