is good in so far as it is. Evil is mere defect, want, or privation. Evil is a mere negation; the good alone is positive. Whatever truly exists, or is thought of as truly existing, must exist as good, and must be thought of as good. The good, then, is the common quality, the element of agreement in all things which exist; it is the supreme category of the universe. The Megaric school was likewise famous for the logical puzzles with which it perplexed itself and its neighbours. One of these was called the Sorites, or the heap. Is one grain of corn a heap? it is asked. No. Are two grains? No. Three grains? No. And so on, until the person interrogated either says now there is a heap, in which case one grain will have made the difference between a heap and no heap, which seems to be absurd; or else he will say that no number of grains make up a heap, which seems still more absurd. Another puzzle was called Cornutus, or the horned. You have that which you have not lost, have you not? Yes. Then you have horns, for you have not lost horns.
16. In the novel of 'Don Quixote,' a Megaric puzzle, or a case which may be regarded as such, is brought under our notice. Sancho Panza, having been appointed governor of the island of Baratria, has to deal with many perplexing law cases when seated on the bench, and among others with the following: There was a bridge over a river in the neighbourhood, which a certain rich man had built for the benefit of travellers,
