There are cases where experience teaches us that a person is not able to carry out an order, say, of the form, “Bring me x” if he did not see what was in common between the various objects to which I pointed as an explanation of “x”. And “seeing what they have in common” in some cases consisted in pointing to it, in letting one's glance rest on a coloured patch after a process of scrutiny and comparing, in saying to oneself, “Oh, it's red he means,” and perhaps at the same time glancing at all the red patches on the various objects, and so on. ◇◇◇ ‒ ‒ There are cases, on the other hand, in which no process takes place comparable with this intermediary “seeing what's in common”, and where we still use this phrase, though this time we ought to say, “If after shewing him these things he brings me another red object, then I shall say that he has seen the common feature of the objects I shewed him.” Carrying out the order is now the criterion for his having understood.

(2015–) Wittgenstein Source Bergen Nachlass Edition (WS-BNE). Edited by the Wittgenstein Archives at the University of Bergen under the direction of Alois Pichler. In: Wittgenstein Source, curated by Alois Pichler (2009–) and Joseph Wang-Kathrein (2020–). (N) Bergen: WAB.