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In our talks upon evolution, as I mentioned in the first lecture, we have been dealing somewhat with suppositions, and concerning ourselves with possibilities. Certain things we do know, and certain truths have been ascertained; yet even the conclusions of science, for instance, such as were so much spoken of and insisted upon forty years ago, are no longer regarded as facts, and are not used or promulgated as drastically and as emphatically as they were. Science itself is finding every year that its knowledge is very relative. (en) |
