I wrote "This is not an important topic" and it marked it wrong... =(
Why not "That topic is not important"?
I believe "that topic/subject" would be הנושא הזה rather than זה נושא . The phrase זה נושא means "this is a subject". (FWIW, I made the same mistake.)
I don't understand the order of the words here. I understood something like 'This a non-important subject'. I mean, this translation wouldn't be for the sentence: "זה לא נושא חשוב"
zeh nosé lo khashúv
Is, "This topic is not important" really wrong.