Every category is dual to its own dual, so if a statement holds in all categories so does its dual.

Where irritation coincides with sensation to produce the same catenations of motion, as in inflammatory fevers, they are excited with still greater energy than by the irritation alone. So when children expect to be tickled in play, by a feather lightly passed over the lips, or by gently vellicating the soles of their feet, laughter is most vehemently excited; though they can stimulate these parts with their own fingers unmoved. Here the pleasureable idea of playfulness coincides with the vellication; and there is no voluntary exertion used to diminish the sensation, as there would be, if a child should endeavour to tickle himself.

At present, there are only three routes to Medog on foot.

And ſhe ſaid, As the Lord thy God liueth, I haue not a cake, but an handfull of meale in a barrell, and a little oyle in a cruſe: … New International Version translation: “As surely as the Lord your God lives,” she replied, “I don’t have any bread—only a handful of flour in a jar and a little olive oil in a jug. …