"It's only fashion that has said the pendulum has swung from extreme skepticism about extraterrestrial life to extreme credulity. The truth is somewhere in between."

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A rational reaction against the irrational excesses and vagaries of scepticism may, I admit, readily degenerate into the rival folly of credulity. To be engaged in opposing wrong affords, under the conditions of our mental constitution, but a slender guarantee for being right.

— William E. Gladstone