He answers, the people of these isles, and particularly the seers, are very temperate, and their diet is simple and moderate in quantity and quality; so that their brains are not, in all probability, disordered by undigested fumes of meat or drink. Both sexes are free from hysteric fits, convulsions, and several other distempers of that sort. There are no madmen among them, nor any instance of self-murder. It is observed among them, that a man drunk, never has a vision of the second-sight; and he that is a visionary would discover himself in other things as well as in that; nor are such as have the second-sight, judged to be visionaries by any of their friends or acquaintance. Secondly, it is objected, that there are none among the learned able to oblige the world with a satisfactory account of these visions; therefore they are not to be believed. He answers, if everything of which the learned are not able to give a satisfactory account, shall be condemned as false and impossible, we shall find many other things, generally believed, which must be rejected as such. Thirdly, it is objected, that the seers are impostors, and the people who believe them are credulous, and easy to be imposed upon. He answers, the seers are generally illiterate, and well-meaning people, and altogether void of design; nor could he ever learn that any of them made the least gain of it; neither is it reputable among them to have that faculty; beside, the people of the Isles are not so credulous as to believe an impossibility, before the thing foretold be accomplished; but when it actually comes to pass, afterwards it is not in their power to deny it, without offering violence to their senses and reason; beside, if the seers were deceivers, can it be reasonable to imagine that all the islanders, who have not the second-sight, should combine together and offer violence to their understandings and senses, to force themselves to believe a lie from age to age? There are several persons among them, whose birth and education raise them above the suspicion of concurring with an imposture merely to gratify an illiterate and contemptible sort of persons. Nor can a reasonable man believe, that children, horses, and cows, could be engaged in a combination to persuade the world of the reality of a second-sight. Every vision that is seen comes exactly to pass according to the rules of observation, though novices and heedless persons do not always judge by those rules; concerning which he gives instances. There are visions seen by several persons, in whose days they are not accomplished; and this is one of the reasons why some things have been seen, that are said never to have come to pass; and there are also several visions seen, which are not understood till they are accomplished.