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How to Solve It (Princeton Science Library)
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- Вадим Мазурhar citeretfor 2 år siden
What
is the unknown? - rezafaizarahmanhar citeretfor 2 år siden
Solving problems is a practical skill like, let us say, swimming. We acquire any practical skill by imitation and practice. - seduneonhar citeretfor 3 år siden
Nothing is more important than to see the sources of invention which are, in my opinion, more interesting than the inventions themselves
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