ated that men of science work by means of induction (归纳法) and deduction, that by the help of these operations, they, in a sort of sense, manage to extract from Nature certain natural laws, and that out of these, by some special skill of their own, they build up their theories. (49) And it is imagined by many that the operations of mon mind can be by no pared with these processes, and that they have to be acquired by a sort of special training. To hear all these large words, you would think that the mind of a man of science must be constituted differently from that of his fellow men; but if you will not be frightened by terms, you will discover that you are quite wrong, and that all these terrible apparatus are being used by yourselves every day and every hour of your lives. There is a well
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