"A man is a human."

Translation: Mężczyzna to człowiek.

[JelleOK]

Why is it człowiek in the sentence 'mężczyzna to człowiek' but człowiekiem in the sentence 'dziewczynka to człowiekiem'?

[Jellei]

It's not, "Dziewczynka to człowiekiem" is wrong.

It's either "[Mężczyzna/Dziewczynka] to człowiek" or "[Mężczyzna/Dziewczynka] jest człowiekiem".

See more info here: https://forum.duolingo.com/comment/16373167

[Denise763738]

Thank you, Jellei!

[struankl]

Could it not be 'człowiek jest człowiekiem'?

[PippoQualu]

No, this would be "a person is a ...person"

[Emwue]

Absolutely not in Polish and using "man" to mean "human" is frowned upon in English too, those days. Kobiety również są ludźmi(women are people too), you know. ;)

Seriously though, if you meant "Mężczyzna jest człowiekiem" is not accepted, you should report it.

[losik55]

Miężczyzna to jest człowiekiem is not true Polish?

[Jellei]

You don't use Instrumental after "to".

[tryingveryhard]

Oh, that explains why I keep getting these wrong. Oof. Thanks though :>

[Mrfunky04]

Is that the point of saying to instead of jest. To avoid the instrumental case?

[alik1989]

Exactly, same as with jest, which is used to avoid the nominative case ;)