The office of science is not to record possibilities; but to ascertain what nature does...As far as Darwinism deals with mere arguments of possibilities or even probabilities, without a basis of fact, it departs from the true scientific method and injures science, as most of the devotees of the new ism have already done.

'Professor Agassiz on the Darwinian Theory...Interesting Facsimile Letter from the Great Naturalist', Scientific American, 1874