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Quotation from The Problems of Philosophy by Bertrand Russell
“Is there any knowledge in the world which is so certain that no reasonable man could doubt it?”
The Problems of Philosophy, Chapter I (Project Gutenberg text)
The opening question of the book, which Russell calls one of the most difficult that can be asked.
Citation: "Is there any knowledge in the world which is so certain that no reasonable man could doubt it?" — Bertrand Russell, The Problems of Philosophy, Chapter I (Project Gutenberg text). (id russell-problems-of-philosophy-q1)
Portrait: Bertrand Russell transparent bg, Photographer not identified, Public domain.
