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23175 | The conclusions of speculative reason about necessities are certain [Aquinas] |
Full Idea: Since the speculative reason is concerned chiefly with necessary things, which cannot be otherwise than they are, its proper conclusions, like the universal principles, contain the truth without fail. | |
From: Thomas Aquinas (Summa Theologicae [1265], I-II Q94 4) | |
A reaction: This seems over-confident, and to confuse the facts with our knowledge of the facts. Simple arithmetic may seem certain, but long and intricate proofs are always a little uncertain. |