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- When you are studying any matter, or considering any philosophy, ask yourself only:
- What are the facts, and what is the truth that the facts bear out.
- Never let yourself be diverted, either by what you wish to believe,
- or what you think could have beneficent social effects if it were believed;
- but look only and solely at what are the facts.
— Bertrand Russell, BBC: "Face to Face" (1959)