The disagreement that matters most may concern what counts as evidence in the first place.

Arguments that will not resolve are usually not about the facts on the table. Underneath them sits a quieter disagreement about what would count as a good reason at all: whether personal experience settles it, whether a study outranks a story, whether trusted people can be wrong. Two people running different rules can trade information forever without moving, because each keeps offering the kind of proof the other does not accept.

When a discussion stalls, stop adding examples and ask what would count. What would change your mind, and what would change theirs. Even if you disagree afterwards, you will at least be disagreeing about the same thing.