But this "emotions are often
believed to get in the way of reason's proper workings....." seems also an opinion because of "believed" in the middle. So I mean both the former and the latter seem to be opinions not opinion+fact.
It depends on what the writer believes. Yes, this is still an opinion, but the writer obviously takes the position that he is right. 1. "It used to be believed that the earth was flat. In fact, it is round." That is an example of its use to introduce a contradiction. 2. "It used to be believed that the earth was flat. In fact, they thought that sailors would fall off the edge if they went to far." That is an example of a supportive statement.
The dictionary's definition of "in fact" is "
to be used to add some more thing to previously said sentences."
That's a very non-specific "definition" and could define many words, such as "Furthermore, in addition, moreover, also ..." There's nothing in that "definition" that would make me think they mean "in fact". In fact, I wouldn't call it a definition.
"Nevetheless" also seems to be used to contradict the previous sentence, then why doesn't it work here?
"Nevertheless" doesn't work here because it doesn't introduce a contradiction. The original sentence functions as in sentence 1. of my previous post. Also, "nevertheless" doesn't generally introduce a contradiction. It introduces a sentence that is true "notwithstanding, or despite, or unrelated" to the truth value of the previous material.
Maybe I'm wrong, but I just want to be assured. You are the only one who can answer me because of our little time difference while others all asleep.


