But imagine this further case:
39).   A certain system of communication is used by a tribe. I will describe it by saying that it is similar to our game 38) except that no table is used in the training. The training might have consisted in several times leading the pupil by the hand along the path one wanted him to go. But we could also imagine a case:
40).   where even this training is not necessary, where, as we should say, the look of the letters abcd naturally produced an urge to move in the way described. This cause at first sight looks puzzling. We seem to be assuming a most unusual working of the mind. Or
perhaps we ask
we may ask
, “How on earth is he to know which way to move if the letter a is shewn him”? But isn't B's reaction in this case the very reaction described in 37) & 38), & in fact our usual reaction when for instance we hear and obey an order? For, the fact that the training in 38) & 39) preceded the carrying out of the order does not change the process of carrying out. In other words the “curious mental mechanism” assumed in 40) is no other than that which we assumed to be
32.
created by the training in 37) and 38). “But could such a mechanism be born with you?” But did you find any difficulty in assuming that that mechanism was born with B, which enabled him to respond to the training in the way he◇◇◇ did? And remember that the rule or explanation given in table 33) of the signs abcd was not essentially the last one, and that we might have given a table for the use of such tables, and so on. (Cf. 21)).