Past tense of reason; thought through logically, or characterized by logical thinking and sound judgment.
From Old French 'raisoner', from Latin 'rationare' meaning to calculate or think. From 'ratio' meaning calculation or reason. The sense of logical thinking developed in Middle English as scholastic philosophy emphasized rational argument.
The word 'reasoned' shares its root with 'ratio' - both come from the Latin idea of calculation or proportion. This connection reveals how logical thinking was originally conceived as a kind of mental mathematics, weighing and measuring ideas against each other.
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