The experience of green is, by definition, whatever goes on in your head when you look at green You never 'look at green'. You can only experience the impres

The experience of green is, by definition, whatever goes on in your head when you look at green You never 'look at green'. You can only experience the impression of instances of green things or have thoughts involving the abstract concept 'green'. You may be looking at a traffic light that just turned green and anxiously press the pedal to reach your destination. Or in the context of a psychological experiment, you may be looking at a green square, while remembering what it was that you were supposed to do when you saw something green. In the same context, you may be asked to think of 'green'. However, that will evoke images of grass, traffic lights, a girlfriend's dress. What goes on inside your head when looking at these instances of something 'green', or thinking of 'green' is a jumble of things, none of which could be described as the 'raw experience' of 'looking at green'. On another note, not involving the actual experience: I was just reading the wikipedia entry on 'Grue and bleen'. It ends with: Kripke then argues for an interpretation of Wittgenstein as holding that it is not possible to state the meaning of a word. That's purely out of philosophical arguments concerning language. If you can not state the meaning of a word, then you can not agree upon your experiences of that word, firstly because you don't know what experience you are trying to relate and secondly because relating it requires other, vaguely defined, words. You may also be interested in http://en.wikipedia.org/wiki/Distinguishing_blue_from_green_in_language http://en.wikipedia.org/wiki/Distinguishing_blue_from_green_...