The bitter, the hollow and - haw! haw! - the mirthless. The bitter laugh laughs at that which is not good, it is the ethical laugh. The hollow laugh laughs at that which is not true, it is the intellectual laugh. Not good! Not true! Well, well. But the mirthless laugh is the dianoetic laugh, down the snout - haw! - so. It is the laugh of laughs, the risus purus, the laugh laughing at the laugh, the beholding, the saluting of the highest joke, in a word the laugh that laughs - silence please - at that which is unhappy.