satisfactoriness

The "truth" of these working ideas is demonstrated in the satisfactoriness of the results to which they lead us.

If these work out with moderate satisfactoriness, we are content to suppose that our assumptions have been confirmed.

I am not half so sure of the satisfactoriness of life and the good qualities of the world as I used to be.

But satisfactoriness is a subjective term, just as idea is; and truth is generally regarded as 'objective.'

But satisfactoriness is both a subjective quality, and a present one.