a person's ability to make good judgments and behave sensibly

常識 (じょうしき), 判断力 (はんだんりょく)
(of an argument, theory, etc.) to be believable or supported by evidence
a person's ability to learn or understand something

灰色の物質, 知能
natural or instinctive intelligence and common sense that comes from personal experience and intuition rather than formal education or training

母の知恵, 自然な知恵
used when one does something even though one knows it is not sensible
to speak in a clear and reasonable manner
the mental state of actively engaging in thought or problem-solving, often with an emphasis on creativity or generating ideas

考え帽子(かんがえぼうし), 発想の帽子(はっそうのぼうし)
to start thinking or acting in a way that seems foolish
a young person or a child who talks and behaves like an older or more experienced person would
exceptionally wise compared to most people at one's age
