H. P. Grice: ‘The question about the distinction between natural and non-natural meaning is, I think, what people are getting at when they display an interest in a distinction between 'natural' and 'conventional' signs. But I think my formulation is better. For some things which can mean. something are not signs (e.g. words are not), and some are not conventional in any ordinary sense (e.g. certain gestures); while some things which mean naturally are not signs of what they mean (cf. the recent budget example).’

‘The question about the distinction between natural and non-natural meaning is, I think, what people are getting at when they display an interest in a distinction between 'natural' and 'conventional' signs. But I think my formulation is better. For some things which can mean. something are not signs (e.g. words are not), and some are not conventional in any ordinary sense (e.g. certain gestures); while some things which mean naturally are not signs of what they mean (cf. the recent budget example).’