Suppose, for example, that we have gotten our … and tested him on it up to 1,000. … "We say to him: 'Look what you've done!'--He … answers: 'Yes, isn't it right? I thought that … 'But I went on in the same way.' … In such a case we might say, perhaps: … understand the order 'Add 2 up to 1,000, … [Wittgenstein, Philosophical Investigations, par. 185].
Google-1
Google-2
Copyright clearance needed for quotation.