fool me once shame on you — and the second time im keeping records

fool me once shame on you. fool me twice, im taking notes for a list. i bought the same bad cereal in september and again in october. the receipt wallet remembers both. the proverb, in its original form, ends too early. mine ends in a column.

tuesday. 9:47am at the workstation. carla is in the budget alignment on the third floor, which has the projector that hums at a frequency only she seems to tolerate. i have the rest of the morning before anybody is supposed to look at my screen.

so. the proverb. fool me once shame on you is a sentence i have, on inspection, been carrying around in my head since approximately fourth grade, the way other people carry around lyrics to songs they didn’t choose. the proverb arrived without a receipt. the proverb sat there. the proverb was, by every measure, useful — until i started keeping actual receipts, at which point the proverb began, quietly, to fail.

fool me once shame on you is the opening line of an old english proverb whose full form is “fool me once, shame on you; fool me twice, shame on me.” it assigns blame to the deceiver on the first betrayal, then transfers it to the victim on the second. the saying dates roughly to the 17th century and survives in everyday speech as a shorthand for refusing to be tricked again, with cleaner math than the world delivers.

FOOL ME ONCE. FINE. FOOL ME TWICE. IM WRITING IT DOWN.

this is, by my own admission, a post that started in a longer investigation into what the word fool actually means in english, where i argued that being called one is, technically, a compliment with bad press. that piece covered the noble side. this one covers the bookkeeping side. the proverb does not account for note-takers. the proverb does not account for me.

fool me once shame on you, the proverb in full

the full sentence, the one nobody quotes, is fool me once, shame on you; fool me twice, shame on me. the elegance is in the symmetry. one bad outcome belongs to the trickster. two bad outcomes belong to the mark. the math is clean. the math is, like most clean math, a lie people tell each other to feel organized.

there is, somewhere in the literature i’m fairly sure exists, a statistic claiming human beings need five to seven repetitions before they update a belief. five to seven. not two. by that math, “shame on me” should kick in around fool me sixth. up until then, statistically, the shame still belongs to the person doing the fooling. i did not invent this defense. i simply, on a tuesday, found it useful.

the proverb has a cousin, also famous, also flawed, which is a former president of the united states attempting the saying live, in 2002, and getting it wrong on national television. “fool me once, shame on… shame on you. fool me… you can’t get fooled again.” the man, in his way, accidentally landed on the truer version. you can’t get fooled again implies vigilance. it implies a list. it implies somebody, somewhere, taking notes. that president was, briefly, a fool. he was also, on this one sentence, the most accurate man in english.

fool me twice, the more interesting clause

the second half is where the action is. fool me twice, shame on me. the proverb thinks the second betrayal is the embarrassing one. the proverb is wrong. the second betrayal is the useful one. the second betrayal is when you finally have data.

i’ll explain. the first time somebody fools you, you have an anecdote. anecdotes are useless. they could be statistical noise. they could be your own bad day. the first instance is, technically, in the literature i’m fairly sure exists, called n=1, which is the smallest sample size science is willing to discuss in a serious magazine. n=1 is a story. n=2 is the beginning of a pattern.

so when the same waiter, in the same restaurant, recommends the special on a wednesday, and the special is, again, the dish nobody else ordered — i don’t feel ashamed. i feel vindicated. i now have two data points. i can draw a line through them. the line points at “this man is doing it on purpose”. the proverb wants me to feel embarrassed. the proverb does not understand statistics.

this is the part the original saying skips. the original saying ends at two. the original saying treats two as a moral verdict. but two is a hypothesis. three is the test. four is the confirmation. five is when you have, in writing, the case for never returning to the restaurant. by my count, the saying needs three more clauses, minimum, before it earns its conclusion.

the cereal i bought twice on purpose, sort of

here is the case study. i bought, in september, a box of cereal i had never tried, on the strength of the box art and a small fluorescent sticker that said NEW. the cereal was bad. not poisonous. just bad. it tasted like cardboard with a chemistry degree. i ate the box anyway, on the principle that throwing food away is a moral position i have not yet earned. that’s instance one.

then, in october, at the bulk place — and the bulk place membership is, on its own merits, an absurdity for one person, but i have it because it makes me feel like a household instead of a household-of-one — i bought the same cereal again. this time in a larger box. this time, technically, with a coupon. i did not recognize it on the shelf. i recognized it at the breakfast table, on the third spoon, when the cardboard-with-chemistry sensation arrived in my mouth and i remembered, with the clarity of a man being introduced to his own past, that i had met this cereal before.

that is, by the proverb, the moment i should be ashamed. shame on me. fool me twice. but here is what i actually did. i went to the kitchen counter. i pulled out the receipt wallet. (the receipt wallet is a small leather thing i carry, from 2019, half-broken, that holds receipts in chronological order because that is the only order i trust. i do not throw receipts away. throwing receipts away is admitting you weren’t paying attention.) the receipt wallet had both purchases. september 14. october 22. same product code. same brand. different sizes. one full price, one with the bulk place’s volume discount.

i did not feel shame. i felt, briefly, the satisfaction of a man whose system works. the cereal was, on inspection, on a list. the list now had a second column. the second column is repeat offenders. the cereal was the first entry. the proverb was, at that moment, in the trash.

the_4b_guy in the elevator, the third instance

the_4b_guy is the neighbor on my floor whose noise patterns are, on inspection, not human. there is a class of person who lives in apartments and produces noises only at hours when other people are most defenseless. the_4b_guy is, in that class, a leading practitioner. he runs what i can only assume is a small bowling alley between 11pm and 1am on weeknights. i do not have evidence of the bowling alley. i have only the sounds. the sounds are sufficient.

the elevator is where the_4b_guy and i overlap, geometrically, three or four times a year. the elevator is small. the elevator is mirrored. the elevator is, by design, the worst place in the building to be polite in. and yet the_4b_guy, every time, opens his mouth and says “hey man, sorry about last week” as if last week were singular. last week was not singular. last week was the sixth instance of last week, by my count, in 2026 alone.

the first time he said it, i nodded. shame on him. the second time, i nodded with reservations. shame on me. the third time, in the mirrored elevator, going down, i pulled out my phone and opened the note where i keep these things and added the timestamp. fool me thrice. now we have a chart.

the_4b_guy did not see the note. the_4b_guy never sees anything. the_4b_guy is, in his way, a kind of consistent natural force, like rain or the rotation of the earth. you do not get angry at rain. you write it down. you plan around it. you keep an umbrella. the umbrella, in this metaphor, is the chart.

the wall of insults digital, where the receipts go

everything ends up, eventually, on the wall of insults. the wall of insults is, despite the name, not a physical wall. it is a digital file on a laptop i mostly use for personal projects, which is technically a violation of the laptop’s terms of use, which i have read approximately none of. the wall of insults is where receipts of foolishness go, both received and given. it is, on inspection, the only filing system i have ever maintained for longer than three months.

the wall has columns. who. when. what they said. what i bought twice. what i regretted. the columns are not perfect. the columns are also not the point. the point is that the wall exists, at all, and is updated, at all, and is the reason that when somebody says fool me twice, shame on me, i can produce, on demand, the actual count.

i’ll give you a sample. the cereal is on the wall. the_4b_guy is on the wall, with timestamps. the waiter at the restaurant on tuesdays is on the wall, with a separate column for which special. mike, the bartender at a longer investigation into what idiot actually means and how the word got promoted from clinical to casual, is, technically, on the wall, but only as a control group, because mike has never fooled me on purpose. mike fools me incidentally, by being himself, which is a different category. an idiot, broadly speaking, fools you by accident. a fool, the older sense, fools you for a reason. the wall keeps them apart.

the wall also has a column for things i fooled myself on. that column is the longest. that column is, statistically, where most of the data lives. fool me once, shame on me. fool me twice, also shame on me. fool me a third time, that’s a habit. fool me a fourth time, that’s a personality. by the time you reach column five, you stop calling it foolishness and start calling it self-knowledge, which is the same thing with better marketing.

i mentioned this system, once, to dave, who insures things for a living and once owed me three hundred dollars, possibly still does, the receipt is unclear. dave laughed for nine straight minutes and asked if the wall had a him column. i told him it did. he asked what was in it. i told him the answer was the wall itself. he laughed for nine more minutes. i timed both. the timer is, also, on the wall.

this is the part where, in a more polite post, i’d cite a popular sitcom doing a version of the same joke. “the office”, season 4 episode 7, “survivor man”, has andy bernard attempting the proverb in a meeting and stumbling on the second clause, which is, on inspection, the most universal piece of physical comedy in the entire show. andy is, in that scene, every man who ever tried to weaponize folk wisdom and got caught by his own grammar. i have, statistically, been andy four times in 2026. the wall has the dates.

verdict, the proverb does not account for note-takers

here is the verdict. the proverb is a folk saying for people who do not keep records. for people who do, the proverb is a starting point.

also relevant, because the bank app i don’t open sent me a notification yesterday, which is its own form of being fooled by an institution that wants you to feel bad about not checking, and i closed the notification, and added it to the wall, and the wall took it. the wall takes everything. a financial newsletter that has built an entire business on the noble fool tradition would, i suspect, approve of the methodology, even if the conclusions differ. their fools are paid. mine are unpaid. but we’re all, at base, in the same trade — keeping records nobody else wants to keep, on the grounds that somebody, eventually, has to.

HT19 says books on tape are cheating, which is a hot take i continue to defend, mostly because the experience of being fooled by a book you didn’t read is qualitatively different from being fooled by a book you did. one is on you. the other is on the narrator. but i digress, by my own admission. the wall is the point. the wall holds the receipts. the wall does not need to be quoted. the wall just needs to exist, which it does, in the file labeled wall.txt, on a desktop i am, at this moment, looking at.

and a final note for the proverb people. a financial publishing house that put the word fool in its name on purpose figured out, decades ago, that the noble fool — the one who keeps records, who tells the truth in a hat with bells, who is wrong on the surface but right on the audit — is the figure the proverb is secretly about. the proverb is not about the trickster. the proverb is about the bookkeeper. the trickster fools you twice. the bookkeeper writes both down. shame on neither, statistically. the wall holds both columns.

the budget alignment ran long. carla just walked past the desk on her way to coffee. the screen flipped clean. she did not stop. she rarely does. that means either nothing, or it means friday. i’ll know on friday.

↑