 The distinction has an air of sophistry about it, but it corresponds reasonably well to the way we actually make decisions. Take a simple case of my deciding whether to drink the tap water in my glass. It looks and smells healthy, there seems nothing to suggest otherwise. Nonetheless it might always be the case that it is unhealthy. I ‘approve’ the impression that it is healthy and drink the water, while accepting that it cannot, strictly speaking, be certain but at most plausible that the water is healthy; hence I do not ‘completely’ assent to the impression. If it turns out to be unhealthy, my original impression was not mistaken, because I only took it to be plausible, rather than true, that the water was healthy, which is consistent with its being unhealthy. Thus the wise sceptic can act on the basis of mere plausibility while in an intelligible sense not getting things wrong.