Doesn't the word "ALL" make your statement self-contradictory?
My statement itself isn't something I believe with certainty, but adding that qualifier to everything I say would be a pointless hassle, especially for things that I believe with a near-enough certainty that my mind feels it is certain. The part with the "ALL" is itself a part of the statement I believe with near certainty, not a qualifier of the statement I believe. Sorry I didn't make that clearer.
Alternatively, what single concept from statistics would most improve people's interpretations of popular news and daily life events?