Every sentence I utter must be understood not as an affirmation, but as a question.

As quoted in A Dictionary of Scientific Quotations (1991) by Alan L. Mackay, p. 35.

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Niels Bohr (Wikipedia) Niels Henrik David Bohr (Danish: [ˈne̝ls ˈpoɐ̯ˀ]; 7 October 1885 – 18 November 1962) was a Danish physicist who made foundational contributions to understanding atomic structure and quantum theory, for which he received the Nobel Prize in Physics in 1922. Bohr was also a philosopher and a promoter of scientific research.