But the facts are unquestioned. The aeroplane does these things, and if the theory does not give warranty for the practice, then it is the theory which is wrong. (John William Dunne)

But the facts are unquestioned. The aeroplane does these things, and if the theory does not give warranty for the practice, then it is the theory which is wrong.

John William Dunne

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aeroplane practice warranty wrong things facts

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