What have the demonstrative explanations of the numerals in common with those of the words “slab”, “column”, etc. except a gesture and pronouncing the words? The way such a gesture is used in the two cases is different. This difference is blurred if one says, “In one case we point to a shape, in the other we point to a number”. The difference becomes obvious and clear only when we contemplate a complete example (i.e., the example of a language completely worked out in detail).)
3).   Let us introduce a new instrument of communication, – – a proper name. This is given to a particular object (a particular building stone) by pointing to it and pronouncing the name. If A calls the name, B brings the object. The demonstrative teaching of a proper name is different again from the demonstrative teaching in the cases 1) & 2).