Let us ask the following question: Suppose that, on one ground or another, B has said, “I can continue the series”, but on being asked to continue it he had shown himself unable to do so, – – should we say that this proved that his statement, that he could continue, was wrong, or should we say that he was able to continue when he said he was? Would B himself say, “I see I was wrong”, or “What I said was true, I could do it then but I can't now”? ‒ ‒ There are cases in which he would correctly say the one and cases in which he would correctly say the other. Suppose a) when he said he could continue he saw the formula before his mind, but when he was asked to continue he found he had forgotten it; – – or, b) when he said he could continue he had said to himself the next five terms of the series, but now finds that they don't come into his mind; – – or c) before, he had continued the series calculating five more places, now he still remembers these five numbers but has forgotten how he had calculated them; – – or d) he says, “Then I felt I could continue, now I can't”; – – or e), “When I said I could lift the weight my arm didn't hurt, now it does”; etc.

(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.