From Citizendium, the Citizens' Compendium
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- What Is An Agnostic? by Bertrand Russell, .
- Why I am Not a Christian by Bertrand Russell (March 6, 1927).
- Why I Am An Agnostic by Robert G. Ingersoll, .
- Dictionary of the History of Ideas: Agnosticism
- The Secular Web
- Stanford Encyclopedia of Philosophy entry
- Fides et Ratio – the relationship between faith and reason Karol Wojtyla