Epistemic
Etymology
From Greek episteme, "knowledge, understanding" (from epistasthai, "to know how to do"). Where "epistemology" is the study of knowledge, "epistemic" is the everyday adjective — letting you flag that a disagreement is really about what we can know, not what we should do.
adjective · /ep-ih-STEM-ik/
Relating to knowledge — how we know things, how justified a belief is, how reliable a source is.
What it names
A precise handle for talking about the quality of knowing itself: "epistemic humility," "epistemic bubble," "an epistemic problem, not a moral one."
Example
Their disagreement was epistemic, not political: they trusted completely different sources.
Related idea
Epistemic humility — holding beliefs in proportion to your evidence — is the most useful phrase built from it.