"What is tea? What is water? Who am I?"
Translation:चाय क्या है? पानी क्या है? मैं कौन हूँ?
Perhaps you used the wrong characters to create that word:
कौन = क + ौ + न = क + औ + न
काैन = क + ा + ै + न = क + आ + ऐ + न
They look exactly the same written out, but only the first one is correct as far as Duo knows.
Cool streak, by the way.
What's the difference between them? Or is it just a Duolingo bug that it doesn't understand they're the same?
Duolingo used Existential question! Duolingo is confused. It hurt itself in its confusion!
The answer to all of those questions is "mostly molecules made up of hydrogen and oxygen". The rest of you is mostly carbon and nitrogen. These four atoms are the most abundant in the universe apart from helium (which is a noble gas and can only make you sound funny). Does that make you feel special?