I’m taking a guess but I would say, weak: off topic
This is true. The general theory regarding personality development is that some aspects of our personality remain constant, while others will change due to environment. This entails a mixture of "nurture and nature" with regard to personality.
The correct sentence is "facts and opinions are not necessarily in opposition". That is so because one can agree with a fact.
On the other hand "fact" may not be a synonym of "opinion". In research you can use "facts", "opinions" or both. It is so because one does not exclude the possibility of using the other. They are not necessarily anthonyms/ opponents. an opinion is not more important than a fact, but on the contrary, because facts can be proved easier than opinions.
