There is no quicker way for a scientist to bring discredit upon himself and on his profession than roundly to declare – particularly when no declaration of any kind is called for – that science knows or soon will know the answers to all questions worth asking, and that the questions that do not admit a scientific answer are in some way non-questions or pseudo-questions that only simpletons ask and only the gullible profess to be able to answer.

-Peter Medawar

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