"Delfine sind schlau."

Translation: Dolphins are smart.

[Jewgoslav]

Macht's gut, und danke für den Fisch.

[Seoman6]

:D

[InesPugnabile]

I saw that in German there are both spellings Delfin and Delphin, which one is more common?

[BillJim]

What's wrong with "Dolphins are crafty". I'm sure they would rather be thought of as "crafty" rather than "sly" which Duolingo accepts as a translation of "schlau".

[RonanSill]

I used astute & it was refused. Crafty, perceptive...all better than smart! Are we wrong?

[Abecula]

How do I stop having this man's voice in my lessons? It's not an improvement!

[johnwilliams11]

My answer marked wrong - incorrectly

[CainJ]

Tell that to the Japanese

[Jakub_Pawlik]

So do I correctly understand, that the word "schlau" can have both positive and negative meaning, depending on context?

[SimonB-27]

First option for the translation of "clever" in my dictionary is "schlau" but "Dolphins are clever" is marked wrong. On the assumption my translation is perfecly sensible, please correct this. No British English speaker would say smart to mean clever. It's an Americanism.

[CapnDoug]

I'm American. I put "Dolphins are clever." and that was accepted as correct.