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  What it means

  Literally “by healthy reason,” this phrase means “by common sense” or “logically speaking.” It is used when someone is applying plain, practical reasoning rather than complex analysis. Poles use it to introduce a straightforward conclusion that should be obvious to anyone thinking clearly. It often carries a slightly impatient tone, suggesting that the answer is self-evident.

  Vocabulary

  • zdrowy — healthy, sound
  • rozum — reason, mind, intellect
  • na — by, on (governing accusative here)

  Grammar note

  The preposition 'na' here takes the accusative case, giving 'zdrowy rozum' (accusative). This construction expresses manner or means — literally 'via healthy reason.' Note that 'zdrowy' is an adjective agreeing with 'rozum' in case, number, and gender (masculine singular accusative).

  Cultural context

  This is a neutral, everyday expression used across all registers. It is similar in spirit to the English 'if you just think about it' or 'by any common sense.' It is not sarcastic in itself, though tone of voice can add irony. You will hear it in everyday arguments, news commentary, and casual debate.

  Intermediate

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