This week I chose Planck because we’re struggling—not just with truth, but with where truth honestly ends. In science, Planck time marks the boundary where our best explanations stop working and humility becomes necessary. In our social and political world, we rarely mark those boundaries. We push certainty past what evidence can support, and communication breaks down as beliefs harden into identities. This week’s piece explores what happens when we forget where explanation ends—and why learning to recognize those limits may be the first step back toward understanding one another.