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In order that a new theory should constitute a discovery or step forward it should conflict with its predecessor...it should contradict its predecessor; it should overthrow it. In this sense, progress in science-or at least striking progress-is always revolutionary.
为了使一种新的理论成为一种发现或向前迈进，它应该与它的前身发生冲突。它应该与它的前身相矛盾;它应该推翻它。从这个意义上说，科学的进步——或者至少是惊人的进步——总是革命性的。