rationality

noun

the quality of being consistent with or based on logic
道理にかなっていて、また道理に基づいている性質
the state of having good sense and sound judgment
分別があり的確な判断ができること
- his rationality may have been impaired
  彼の合理性は損なわれたかもしれない
- he had to rely less on reason than on rousing their emotions
  彼は情緒をかき乱すことよりも理性に訴えなくてはならない

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