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第01章 演绎法的研究(5)

Not at all, I answered earnestly.

It is of the greatest interest to me, especially since I have had the opportunity of observing your practical application of it.

But you spoke just now of observation and deduction.

Surely the one to some extent implies the other.

Why, hardly, he answered, leaning back luxuriously in his armchair and sending up thick blue wreaths from his pipe.

For example, observation shows me that you have been to the Wigmore Street Post-Office this morning, but deduction lets me know that when there you dispatched a telegram.

Right! said I. Right on both points!

But I confess that I don't see how you arrived at it.

It was a sudden impulse upon my part, and I have mentioned it to no one.

It is simplicity itself, he remarked, chuckling at my surprise so absurdly simple that an explanation is superfluous; and yet it may serve to define the limits of observation and of deduction.

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