|About thirty years ago there was much talk
that geologists ought only to observe and not theorize; and I well remember
someone saying that at this rate a man might as well go into a gravel-pit
and count the stones and describe the colors...how odd it is that anyone
would not see that all observation must be for or against some view, if
it is to be of any service.
Charles Darwin, letter to Fawcett, 18 September 1861
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