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Ragnar Granit

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Science  27 Oct 1967:
Vol. 158, Issue 3800, pp. 469-471
DOI: 10.1126/science.158.3800.469


If it shall be demanded, then, when a man begins to have any ideas? I think the true answer is, when he first has any sensation. For since there appear not to be any ideas in the mind before the senses have conveyed any in, I conceive that ideas in the understanding are coeval with sensation. . . .

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