the.com/rationale

The reason you give after the decision you already made emotionally.

means A stated set of reasons meant to justify a decision, belief, or action.

from From Latin 'rationalis' ('of reason'), rooted in 'ratio' meaning reckoning, calculation, or reason. The word entered English in the 1600s as a term for a systematic explanation or exposition — originally more like a reasoned account of something's workings, before narrowing toward its modern sense of 'the justification behind a choice.'

origin
Latin for pertaining to reason
vs reason
reason causes, rationale justifies afterward
office use
often means please stop asking why
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