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Full Idea
Understanding is really translation, whether into other symbols or into action.
Gist of Idea
Understanding is translation, into action or into other symbols
Source
Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], B I.5)
Book Ref
Wittgenstein,Ludwig: 'Lectures in Cambridge 1930-32', ed/tr. Lee,Desmond [Blackwell 1980], p.24
A Reaction
The second part of this sounds like pure pragmatism. To do is to understand? I doubt it. Do animals understand anything?