Flexible truth
I'm still troubled by the concept. Imo, it's our perception and definition of reality that's fuzzy, not reality (or "truth") itself. How we descibe things, and how that changes over time when we discover we're wrong about something, doesn't have any effect on "what actually is."
I know people who have confused perception with reality (I'm not suggesting anyone here has done so). For them, truth is divorced from reality and happens to be whatever's rolling around in their head at the time.