„But then science is nothing but a series of questions that lead to more questions.“

— Terry Pratchett

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„As soon as questions of will or decision or reason or choice of action arise human science is at a loss.“
— Noam Chomsky
„There are no forbidden questions in science, no matters too sensitive or delicate to be probed, no sacred truths.“
— Carl Sagan
„An experiment is a question which science poses to Nature and a measurement is the recording of Nature's answer.“
— Max Planck