Idealism and Realism, in relation to laughter, [394], [396], [400], [401].
Ignorance, as laughable, [102].
Imitation in fashion, [273]–276, [278]; in comedy, [348].
Incompetence, as laughable, [102], [240], [245].
Incongruity, theory of, [7], [9], [13], [17], [125]–135, [136], [141], [150], [317], [318]; as laughable, [107]–111, [152], [216], [236].
Indecent, the, as laughable, [99], [151], [235].
Individual, the, laughter of, [295], [297] (Chapter X.), [393]; value of laughter to, [321], [323] ff., [403], [415]; justification of point of view of, [405].
Inferior, laughter of, at superior, [264], [265], [266], [267], [268].
Inferiority, feeling of, as inhibiting laughter, [143], [320].