Hume Sceptical Part III

Hume says there is a useful scepticism. The greater part of mankind are naturally apt to be affirmative and dogmatical in their opinions; and while they see objects only on one side, and have no idea of any counterpoising arguments, they throw themselves into the principles, nor have they any indulgence for those who entertain opposite sentiments. Another attribute to Pyrrhonian, excessive scepticism, doubt, is the limitation of our enquiries to such subjects as are best adapted to the narrow capacity of human understanding. When dealing with the sciences a proposition can be determined false, an argument can be proven using cause and effect experiences. But if we reason a priori, anything may appear able to produce anything. Such is the case in moral understanding. So Hume suggests a middle path of scepticism.