dreamer and the idea that fills his imagination at the time, a gust of wind blowing down the chimney becomes the howl of a wild beast or a tuneful melody. Such is the ordinary mechanism of illusion in dreams.
Now, if comic illusion is similar to dream illusion, if the logic of the comic is the logic of dreams, we may expect to discover in the logic of the laughable all the peculiarities of dream logic. Here, again, we shall find an illustration of the law with which we are well acquainted: given one form of the laughable, other forms that are lacking in the same comic essence become laughable from their outward resemblance to the first. Indeed, it is not difficult to see that any play of ideas may afford us amusement if only it bring back to mind, more or less distinctly, the play of dreamland.
We shall first call attention to a certain general relaxation of the rules of reasoning. The reasonings at which we laugh are those we know to be false, but which we might accept as true were we to hear them in a dream. They counterfeit true reasoning just sufficiently to deceive a mind dropping off to sleep. There is still an element of logic in
