Basically it comes down to requiring indisputable evidence (not faith) before accepting a statement as true. Any statement that becomes falsified is immediately rejected as a known falsehood. So we have a concept of what is true and what is not based on testing claims in a measurable way that have a clear method to see success and a clear method to see failure. Some claims fall into the gradient in-between and we resolve to mathematical statistical probability of likelihood to determine relevance in future discourse. The greatest honor is science is to either discover a new level of understanding or discredit a previously held truth. Both make them a star and a pillar in the history of science. Truth and only testable truth that has never failed is permitted to remain.