common sense

If someone offers to sell you a piece of the Brooklyn Bridge and you decline, that's common sense, i.e., a sound practical judgement about everyday manners.

Common sense does not necessarily imply any great quality of mind; that explains why it is considered common (as opposed to extraordinary). As the famous Irish playwright George Bernard Shaw once noted: "A man of great common sense and good taste — meaning thereby a man without originality or moral courage."

Definitions of common sense
1

n sound practical judgment

Common sense is not so common”
Synonyms:
good sense, gumption, horse sense, mother wit, sense
Types:
logic
reasoned and reasonable judgment
nous
common sense
road sense
good judgment in avoiding trouble or accidents on the road
Type of:
discernment, judgement, judgment, sagaciousness, sagacity
the mental ability to understand and discriminate between relations

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