Fiction could be the opposite. Non-factual also could be the opposite.
The opposite of storial is factual.
actual, real, factual
If by editorial you mean a comment, then antonyms would be silence or quiet.If by editorial you mean a critique, then the antonyms would be praise or compliment.
True means correct, factual. False is the opposite - it means not true or not correct.
The opposite of true (factual) is false. It might also be unreal or fictional. The opposite of true (direction) could be skewed or angled. The opposite of true (loyal, steadfast) could be disloyal, unfaithful, or fickle.
Of course not. In fact, it is just the opposite. The site was designed to give knowledgeable, factual answers.
Yes, factual is an adjective.
Factual is an adjective.
Factual writing is nonfiction.
A factual passage is a passage which has facts in it either you have to write a factual passage or use it as comprehension
A factual co relation of one factual element with another factual element in literature
Not all words have antonyms, and there is no clear choice for the word memoir. Either you record your memories or you don't. The opposite of a memoir is not having a memoir. I might say that since memoirs are supposed to be factual records of events, the opposite would be a work of fiction, but that's stretching.