Refutable [adjective]

Definition of Refutable:

guessed, assumed

Opposite/Antonyms of Refutable:

Sentence/Example of Refutable:

It is certainly not the least charm of a theory, says Nietzsche, that it is refutable.

If my belief ever had its origin in reason, it must be ever refutable by reason.

It is a race-slander, refutable by any honest investigator, that the American Negro as a race is unwilling to work.