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 ra·tio·nal·i·ty /ˌræʃəˈnæləti/
 合理性,純理性,辨別道理

 ra·tio·nal·i·ty /ˌræʃəˈnælətɪ/ 名詞
 合理性

 Ra·tion·al·i·ty n.; pl. -ties   The quality or state of being rational; agreement with reason; possession of reason; due exercise of reason; reasonableness.
    When God has made rationality the common portion of mankind, how came it to be thy inclosure?   --Gov. of Tongue.
    Well-directed intentions, whose rationalities will never bear a rigid examination.   --Sir T. Browne.
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 rationality
      n 1: the state of having good sense and sound judgment; "his
           rationality may have been impaired"; "he had to rely
           less on reason than on rousing their emotions" [syn: reason,
            reasonableness]
      2: the quality of being consistent with or based on logic [syn:
          rationalness]