§51. In describing language-game (§48) I said that the words "R", "B", etc.
"corresponded to the colours of the squares". But what does this
consist in; in what sense can one say that certain colours of squares "correspond
to these signs"? For the account in (48) merely set up a connexion between those
signs and certain words of our language (the names of colours).—Well, it was
presupposed that the use of the signs in the language-game would be taught in a
different way, in particular by pointing to paradigms. Very well; but what does
it mean to say that in the technique of using the language "certain elements
correspond to the signs"?—Is it that the person who is describing the complexes
of coloured squares always says "R" where there is a red square; "B" when there
is a black one, and so on? But what if he goes wrong in the description and
mistakenly says "R" where he sees a black square—what is the criterion by which
this is a mistake?—Or does "R"s standing for a red square consist in this, that
when the people whose language it is use the sign "R" a red square always comes
before their minds?
In order to see more clearly, here as in countless similar cases, we must focus on the details of what goes on; must look at them from close to.