The theory of truth is a series of truisms.

Are cans constitutionally iffy? Whenever, that is, we say that we can do something, or could do something, or could have done something, is there an if in the offing--suppressed, it may be, but due nevertheless to appear when we set out our sentence in full or when we give an explanation of its meaning?

I begin, then, with some remarks about 'the meaning of a word.' I think many persons now see all or part of what I shall say: but not all do, and there is a tendency to forget, or to get it slightly wrong. In so far as I am merely flogging the converted, I apologize to them.

"What is truth?" said jesting Pilate, and would not stay for an answer. Pilate was in advance of his time. For "truth" itself is an abstract noun, a camel, that is, of a logical construction, which cannot get past the eye even of a grammarian. We approach it cap and categories in hand: we ask ourselves whether Truth is a substance (the Truth, the Body of Knowledge), or a quality (something like the colour red, inhering in truths), or a relation ("correspondence"). But philosophers should take something more nearly their own size to strain at. What needs discussing rather is the use, or certain uses, of the word "true." In vino, possibly, "veritas," but in a sober symposium "verum."

There is no one kind of thing that we 'perceive' but many different kinds, the number being reducible if at all by scientific investigation and not by philosophy: pens are in many ways though not in all ways unlike rainbows, which are in many ways though not in all ways unlike after-images, which in turn are in many ways but not in all ways unlike pictures on the cinema-screen--and so on.

Our common stock of words embodies all the distinctions men have found worth drawing, and the connexions they have found worth marketing, in the lifetimes of many generation; these surely are likely to be more numerous, more sound, since they have stood up to the long test of thee survival of the fittest, and more subtle, at least in all ordinary and reasonably practical matters, than any that you or I are likely to think up in our arm-chairs of an afternoon-the most favoured alternative method.

Sentences are not as such either true or false.