known unknowns
/ˌnoʊn ʌnˈnoʊnz/
things we are aware we don't know
known unknowns in a sentence
“Planning for known unknowns is easier than for unknown unknowns.”
Origin of known unknowns
Popularized by Donald Rumsfeld (2002)
Related Words
Knightian uncertainty
uncertainty that cannot be quantified with probabilities
overconfidence
having more certainty than warranted by evidence
calibration
the alignment between confidence levels and actual accuracy
epistemic humility
acknowledging the limits of one's own knowledge
hedging
qualifying statements to acknowledge uncertainty
confabulation
producing false information without intent to deceive; filling gaps