Conditional knowledge subject to relentless reassessment in light of new data. That's what comes to mind when I think of the scientific way of knowing. Progressive approximations of reality. Only those approximations that can account for known facts, predict new ones, and accommodate established uncertainties get to be called facts. It's a harsh standard. It usually doesn't fit with how we might wish the universe to be. Ironically it's that failure to bend to our wishes and desires that speaks to its truth.