"It's strange, isn't it. You stand in the middle of a library and go aaaaagghhhh' and everyone just stares at you. But you do the same thing on an aeroplane, and everyone joins in."

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The true method of discovery is like the flight of an aeroplane. It starts from the ground of particular observation; it makes a flight in the thin air of imaginative generalization; and it again lands for renewed observation rendered acute by rational interpretation.

— Alfred North Whitehead