However well equipped our language, it can never be forearmed against all possible cases that may arise and call for description: fact is richer than… - John Langshaw Austin

Words are not (except in their own little corner) facts or things: we need therefore to prise them off the world, to hold them apart from and against it, so that we can realize their inadequacies and arbitrariness, and can relook at the world without blinkers.

Infelicity is an ill to which all acts are heir which have the general character of ritual or ceremonial, all conventional acts.

But surely, speaking carefully, we do not sense "red" and "blue" any more than "resemblance" (or "qualities" any more than "relations"): we sense something of which we might say, if we wished to talk about it, that "this is red."