"It is not necessarily a person."
Translation:No es necesariamente una persona.
No, un is masculine and una is feminine. Duo uses una in the sentence because persona is a feminine noun
on my previous lesson duo said it was un persona so i was like what? okay, and then this one it switched back to una persona ... hmm flaw in the program there
It is my understanding that "persona" is always feminine. So even if you are referring to a man it will still be "una persona" and DL should not have accepted un persona. Just one of those things that you have to memorize.