但是怀疑主义的导言，不仅是一种不令人愉快的工作，而且也是一段多余的路程，正如我们要明示的，辩证过程或矛盾进展本身就是科学一个积极的主要环节。

But a skeptical introduction would be not only an ungrateful but also a useless course; and that because Dialectic, as we shall soon make appear, is itself an essential element of affirmative science.

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