The first statement is called a 'factual claim' and is the pivot point of much debate.

I can have an opinion about factual claims, as mentioned about whether god exists.

Arguments should be supported by appropriate and reasonably accurate factual claims.

A huge number of factual claims are not scientifically testable.

It is true that not all factual claims can be subject to the scientific method - if only repeatability matters.

They are factual claims in which scientific investigators are not, as such, interested.

He would have to accept her factual claims as true for purposes of the legal argument.

Accuracy - The spot makes no substantial factual claims.

But he was right again, in this factual claim at least, if not necessarily in all his implications.

Politics often calls upon more opinion and generalization than factual claims that can be disproved.