@Vamp898@social.tchncs.de No I think you are missing the point. Facts are facts, they are immutable, but YOU and no one else gets to say what is a fact or what is not, because that is debatable.

Yes you can vote if gravity exists because although you may be quite certain it is a fact other people may be quite certain it isnt a fact. Which of these two groups are correct is an opinion, depending on what your opinion is it may be correct or not.

Your fallacy is assuming that if something is an opinion it cant be a fact, that is untrue.

For example some people think the universe is a closed system, other people think it is an open system. There exists a fact where one of these two is true, in reality, despite the fact that some fact exists, people argue as to which of these two is actually the fact. So for example the proper thing to say would be "It is my opinion that the universe is an open system". This is the correct way to state that, even though we are talking about something that is either true or false. If you said "It is a fact ..." well you'd just be a pompas ass and trying to assert dominance where it isnt needed.

Gravity is no different except for the fact that more people agree it is a fact, so you are a lot safer in your opinion of it being fact than not, its more likely to be true. So likely in fact that we may just call it a "fact" for simplicity sake. But in the end it is no different, it is still an opinion about whether it is a fact or not.

To put it another way.. everything you hold in your head are the opinions about those things you beleive to be fact or not. Nothing more, nothing less.