@ LoveUniHateExams,
For example, scientists state that gravity exists. <---- you take their word for it, don't you?
Gravity is not an untestable conclusion, but a demonstratable fact. We all have the same facts but draw sometimes completely different conclusions based on our worldview.
For instance, when dinosaur soft tissues, blood cells and DNA fragments were discovered to be quite common, "millions of years" proponents believed that there must be some unseen agent causing them to be preserved longer than it takes mountain ranges to wear down from erosion and rise up again.
Others with a different worldview believe this "saving device" is absurd and that the facts support a young earth in line with a literal biblical interpretation.
Same facts.... different conclusions. It's the way it is.