“Intention appears to be something that we can express, but which brutes (which e.g. do not give orders) can have, though lacking any distinct expression of intention. For a cat's movements in stalking a bird are hardly to be called an expression of intention. One might as well call a car's stalling the expression of its being about to stop. Intention is unlike emotion in this respect, that the expression of it is purely conventional; we might say 'linguistic', if we will allow certain bodily movements with a conventional meaning to be included in language.”