(Note: Objection: The word “brick” in language 1) has not the meaning which it has in our language. ‒ ‒ This is true if it means that in our language there are usages of the word “brick!” different from our usages of this word in language 1). But don't we sometimes use the word “brick!” in just this way? Or should we say that when we use it, it is an elliptical sentence, a shorthand for “Bring me a brick”? Is it right to say that if we say “brick!” we mean “Bring me a brick”? Why should I translate the expression “brick!” into the expression, “Bring me a brick”? And if they are synonymous, why shouldn't I say: If he says “brick!” he means “brick!” … ? Or: Why shouldn't he be able to mean just “brick!” if he is able to mean “Bring me a brick”, unless you wish to assert that while he says aloud “brick!” he as a matter of fact always says in his mind, to himself, “Bring me a brick”? But what reason could we have to assert this? Suppose someone asked: If a man gives the order, “Bring me a brick”, must he mean it as four words, or can't he mean it as one composite word synonymous with the one word “brick!”? One is tempted to answer: He means all four words if in his language he uses that sentence in contrast with other sentences in which these words are used, such as, for instance, “Take these two bricks away”. But what if I asked, “But how is his sentence contrasted with these others? Must he have thought them simultaneously, or shortly before or after, or is it sufficient that he should have one time learnt them, etc.?” When we have asked ourselves this question, it appears that it is irrelevant which of these alternatives is the case. And we are inclined to say that all that is really relevant is that these contrasts should exist in the system of language which he is using, and that they need not in any sense be present in his mind when he utters his sentence. Now compare this conclusion with our original question. When we asked it, we seemed to ask a question about the state of mind of the man who says the sentence, whereas the idea of meaning which we arrived at in the end was not that of a state of mind. We think of the meaning of signs sometimes as states of mind of the man using them, sometimes as the role which these signs are playing in a system of language.            The connection between these two ideas is that the mental experiences which accompany the use of a sign undoubtedly are caused by our usage of the sign in a particular system of language. William James speaks of specific feelings accompanying the use of such words as “&”, “if”, “or”. And there is no doubt that at least certain gestures are often connected with such words, as a collecting gesture with “and”, & a dismissing gesture with “not”. And there obviously are visual and muscular sensations connected with these gestures. On the other hand it is clear enough that these sensations do not accompany every use of the word “not”, and “&”. If in some language the word “but” meant what “not” means in English, it is clear that we should not compare the meanings of these two words by comparing the sensations which they produce. Ask yourself what means we have of finding out the feelings which they produce in different people and on different occasions. Ask yourself: “When I said, ‘Give me an apple & a pear, & leave the room’, had I the same feeling when I pronounced the two words ‘&’?” But we do not deny that the people who use the word “but” as “not” is used in English will broadly speaking have similar sensations accompanying the word “but” as the English have when they use “not”. And the word “but” in the two languages will on the whole be accompanied by different sets of experiences.)
2).   Let us now look at an extension of language 1). The builder's man knows by heart the series of words from one to ten. On being given the order, “Five slabs!”, he goes to where the slabs are kept, says the words from one to five, takes up a plate for each word, & carries them to the builder. Here both the parties use the language by speaking the words. Learning the numerals by heart will be one of the essential features of learning this language. The use of the numerals will again be taught demonstratively. But now the same word, e.g., “three”, will be taught either by pointing to slabs, or to bricks, or to columns, etc.. And on the other hand, different numerals, will be taught by pointing to groups of stones of the same shape.