"But to measure cause and effect... you must ensure that a simple correlation, however tempting it may be, is not mistaken for a cause. In the 1990s the stork population of Germany increased and the German at-home birth rate rose as well. Shall we credit storks for airlifting the babies?"

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I might inform those humanitarians who have a nightmare of new and needless babies (for some humanitarians have that sort of horror of humanity) that if the recent decline in the birth-rate were continued for a certain time, it might end in there being no babies at all; which would console them very much.

— Gilbert K. Chesterton