the dunning kruger effect definition, expanded over one beer

one beer in, mike said the famous psychology effect was actually pretty simple, which is when you know the next forty minutes are not going to be simple at all.…

so. the dunning kruger effect definition. that is what i typed into the search box at 10:14am on a monday, pretending to format a spreadsheet. carla had her bag ready, headed to a vendor onboarding she calls “the meeting that ate q2”. the morning is mine. plus a napkin from yesterday with “ladder” and “FORTY years” in mike’s handwriting — which looks like a doctor signing for a sandwich.

the dunning kruger effect definition: the pattern where a person with low ability in a skill systematically overestimates that ability, while people with genuine competence tend to underestimate theirs. the gap is widest in the people who don’t know they have it. mike, who heard the term twice on a podcast and absorbed half, calls it “the ladder thing”.

CONFIDENCE. IS. NOT. EVIDENCE. OF. ANYTHING.

the dunning kruger effect definition, in one bar sentence

the textbook version reads, in the kind of sentence written by people paid by the comma, like this: a metacognitive miscalibration in which low-skill individuals fail to recognize their own incompetence, while high-skill individuals slightly underrate themselves. the rest is footnotes.

that version is technically accurate. it is also useless on a tuesday at the corner bar, one beer in, across from a man in a chair leaning back at thirty degrees without falling. for the polite long version there is the full pillar on the dunning-kruger effect, and the side-angle is the meaning post that leans on published research harder. for the bar version, you need mike.

i had walked over because the laundromat next door has the only working dryer on the block. mike was in his chair. one beer. “mike. what is the dunning kruger effect, actually.” mike wiped his beard — the gesture he does when a definition is coming, not an opinion — and gave one sentence.

“the dunning kruger effect,” mike said, “is when somebody who has spent forty minutes on a thing thinks he knows it better than the guy who has spent forty years.”

that was the sentence. then a finger went up. elaboration is coming.

writing this from the desk. it is now 9:47am. carla pinged on chat — “back by 11” — which in carla-language means “back by 11:40, please do not have anything urgent.” understood.

the four pieces of the definition, as mike laid them out

mike broke the one sentence into four pieces, in order, a finger for each. mike does not normally number things. i suspect a podcast.

piece one — the gap. “the effect is a gap. between what you think you can do and what you can actually do. that’s the whole shape.”

piece two — the direction. “the gap goes the wrong way for the bad guys. the worse you are, the bigger it gets. if it was even, nobody’d write it down.”

piece three — the invisibility. “the bad guys can’t see the gap. you don’t know you’re in it. if you knew, you wouldn’t be.”

piece four — the inversion. “the good guys see a gap that isn’t there. they think they’re worse than they are. the quiet ones. the ones you want fixing your sink.”

four pieces. one definition. one beer. tuesdays mike’s rate is faster, three beers in, and he points at people instead of defining them. sundays he paces himself.

three new examples mike used, none of them about himself

mike is, by my unprofessional read, a walking demonstration of the very effect he was defining. i have not said this to mike. you do not say things to mike on a tuesday. you nod, and you take the napkin home.

example one — the borrowed ladder. “kid up the street, twenty-two. redoing his gutters with a ladder borrowed from his uncle — a roofer of forty years. uncle keeps offering to come do it. kid keeps refusing. kid’s on the ladder in shoes that are wrong. uncle’s on the couch. kid will fall. gutters will be crooked.”

example two — the cousin who reads tarot at parties. “she did three cards for my mother in december. confidently. for forty minutes. she’d read about it on a plane. my mother listened politely, went home, called my aunt. my aunt has the actual deck. it’s been in a drawer since 1987. loud one at the table. quiet one in the drawer.”

example three — the guy on the curb explaining cars. “man outside the auto parts store explained to me, with hand gestures, why my battery was fine. it was dead. he had not opened the hood. he was waiting for his ride. did not work there. i jumped the car. man was, last i checked, still on the curb. confident.”

three examples. zero mentions of mike, who was at this point leaning back in a chair he does not own, defining an effect he heard on a podcast he could not name. you do not interrupt the bar version of the dunning kruger effect definition.

the toilet paper hot take, which arrived in the middle, somehow

i don’t know how we got here. one minute mike was on the ladder. the next he was telling me the toilet paper roll goes UNDER, and over is for monsters. mike holds his toilet paper theories with the same firmness as his psychology theories — which is itself an example of the effect, a recursion he does not enjoy on a tuesday.

he said the under-roll is the original orientation. the over-roll, he said, was invented by a hotel chain in the seventies to make housekeeping faster. neither claim is verifiable. he said it didn’t matter. the under-roll is correct because he says it is, which is, in mike’s worldview, sufficient.

where the definition stops working

after the four pieces, after the three examples, after the toilet paper detour, mike took a long pull and said the part that made me want a second beer i did not order.

“the problem with the definition,” mike said, “is everybody thinks they’re the forty-year guy. i’m not. i’m a guy in a bar. you’re a guy at a desk. the forty-year guy is, somewhere, fixing a sink, quietly, not thinking about us. that’s the definition the textbooks won’t put in. but it’s the one you’ll remember.”

i wrote that on the back of the napkin. i underlined guy at a desk, which is where i am right now. mike’s shots arrive sideways. you feel them on the walk home.

(for a longer dictionary version there is the older long-tail i wrote months back, plus the small anchor where i first tried to define this properly.)

findings, with the napkin in front of me

the napkin says “FORTY years,” “ladder,” “guy at a desk,” and a small drawing that looks, depending on the light, like either a roll of toilet paper or a baseball. mike drew it. i did not ask.

• the dunning kruger effect definition, simplest: a gap between perceived and actual ability, going the wrong way for the people who have it.
• the gap is invisible to the people inside it. that is the whole engine.
• everyone privately thinks they are the forty-year guy. statistically, they cannot all be.
• mike was right about the under-roll. mike is also an example of the thing he was defining.

the seventh microwave is currently in the kitchen, behaving. the third yoga mat is still under the couch from 2023, evolving quietly, possibly developing the kind of confident wrongness mike was describing. when it speaks, i suspect it will sound like the man on the curb.

for the same effect on a different evening, i wrote about the same man on a tuesday, with the parsley analogy and three different examples. tuesdays mike points at people. sundays mike defines. for pop-culture grounding, mike’s chair-leaning mode rhymes with the office cold opens, where someone explains a complicated thing badly with full confidence and the camera holds for one second too long.

10:38am. carla messaged: “running over, sorry.” translation: i have, by my count, the rest of the morning. the napkin is mostly pulp.