On seeing red
To begin teaching someone: 'that looks red' makes no sense, for he must say that spontaneously, once he has learned what red means, ie learnt the technique of using that word. For if someone has mastered the use of what looks red - or indeed what looks red to me - he must also be capable of answering the question, 'and what is red like?' and 'what does something look like when it turns red?'
Wittgenstein: Remarks on colour (cited by Derek Jarman, Chroma - a book of colours)
