Significados de refutable en inglés

Why burn writing they could so triumphantly refute, if they were refutable?

Indeed, M. Bergson might seem to be easily refutable out of his own mouth.

This hypothesis, which must be refutable, is used to make a prediction about the phenomenon, which is then tested by experiment.

It is certainly not the least charm of a theory that it is refutable; it is precisely thereby that it attracts the more subtle minds.