There may be fairies at the bottom of the garden. There is no evidence for it but you can't prove that there aren't any so shouldn't we be agnostic with respect to fairies?

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There are two barriers that often prevent communication between the young and their elders. The first is middle-aged forgetfulness of the fact that they themselves are no longer young. The second is youthful ignorance of the fact that the middle aged are still alive.