There Are No Facts. Only Opinions. . Obviously, we need a definition of "fact."
Here's mine. In order for a concept to be a "fact", it has to have at least two properties:
1. Permanence. For example, if you believe it's a fact that the Earth goes around the Sun, you can't just willy nilly believe the opposite the next day. Similarly, if you accept that "X is a fact" you're assuming that people in the future will also accept that "X is a fact."
2. All "facts" are statements.
My position is that these two properties are in contradiction with one another. Consequently, there is no such thing as facts.