A WORD must be said about ‘intention’, I suppose. I have declared an interest in addressing pictures partly by making inferences about their causes, this both because it is pleasurable and because a disposition towards causal inference seems to penetrate our thought and language too deeply to be excised, at least without doing oneself a quite disabling mischief. But since pictures are human productions, one element in the causal field behind a picture will be volition, and this overlaps with …