tough minded

/ˈtʌfˌmaɪndɪd/
adjective
  1. Having a strong, practical, and realistic attitude; not easily influenced by emotion or sentiment.
    • A tough-minded leader makes decisions based on facts, not feelings.
    • She is tough-minded and doesn't let criticism discourage her.
    • The negotiator remained tough-minded even when the other side became emotional.
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