unknown unknown
Ignorance of ignorance
An unknown known is something that is real, but that we don’t know about, such as dark matter in the universe.
An unknown unknown is something that is real but that we don’t know about and we have no idea what it might be.
- riskPossibility of harm
- unknowingnessAbsence of awareness
- uncertaintyState of being unsure
- unexpectedNot anticipated beforehand
- ambiguityOpenness to multiple interpretations
mystery · surprise · blind spots · flying blind · terra incognita · unforeseen · wild card · unpredictability · off the radar · indeterminate · indefinite · unknowability · ignorance · hidden variables · dark matter · serendipity · existential questions · epistemic humility
knowledge certainty
unknown unknowncertainty
Total absence of doubt
common knowledge · received wisdom · expertise · mastery · omniscience
unknown, know, known, unknowns, unknowing, unknowingly, knowable, unknowable, knowledge