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see reason

Adopt a sensible course of action, let oneself be persuaded, as in At ninety Grandma finally saw reason and gave up driving her car. This expression, which uses reason in the sense of “good sense,” was first recorded in Shakespeare's 1 Henry IV (1:2).

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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.