{"slug": "we-asked-ai-to-judge-our-grocery-fight-it-didnt-side-with-either-of-us", "title": "We Asked AI to Judge Our Grocery Fight. It Didn’t Side With Either of Us.", "summary": "A man who waited an hour at a Chinese supermarket for 30-40% discounts on fresh food asked an AI to judge a dispute with his wife over whether the wait was worth it, and the AI calculated his hourly wage at ¥27.17, rain risk cost at ¥15.00, and total wait cost at ¥42.17, requiring discounts to exceed that to break even. The AI did not side with either spouse, instead showing that the man's savings on items like braised pork (¥5.60 saved) and fried fish (¥6.40 saved) totaled ¥26.40, falling short of the ¥42.17 threshold, revealing the argument was about more than just money. The man, who earns ¥5,000 monthly over 23 working days, acknowledged he was wrong about the argument's true nature after the AI's neutral analysis.", "body_md": "*I was wrong about what the argument was really about.*\n\nAfter work on a Thursday, I stopped at the supermarket to restock the fridge. It was around 7pm. I’d figured out that the store marks down fresh food at 8pm — anything unsold gets cut 30–40%. So I waited. In the supermarket. For one hour.\n\nI came home carrying bags of discounted food. My wife had been waiting too. She was not happy.\n\n“You waited an hour,” she said. “It might rain tonight — that’s a ¥30 taxi home. How much did you actually save? Was any of this even worth it?”\n\nI was confident. I’d watched the prices drop with my own eyes. I’d seen the crowds. I was sure I was right.\n\nSo I did what I’ve started doing whenever I’m certain I’m right and want proof: I opened an AI, sent it the photos and the numbers, and asked it to run the math.\n\nI expected it to hand me a clean win.\n\nIt did the math. But it didn’t hand me exactly what I expected.\n\n## First: The Calculation\n\nI gave the AI the facts. Monthly salary: ¥5,000. Working days per month: 23. Hours per day: 8. Time I waited: one hour. Chance of rain: roughly 50%. Taxi cost if it rained: ¥30.\n\nThe AI’s math:\n\n**My hourly wage:**¥5,000 ÷ (23 × 8) =**¥27.17****Rain risk cost:** 50% × ¥30 =**¥15.00****Total cost of one hour’s wait:****¥42.17**\n\nTo break even, my discounts had to add up to at least ¥42.17. That was the number. That was what my wife was really asking.\n\n## What Was Actually On Sale (A Real Price Tour for Anyone Who’s Never Seen a Chinese Supermarket)\n\nHere’s every discounted item I bought that night, with original and sale prices. If you’ve never been inside a Chinese supermarket, consider this a photo essay with receipts.\n\nEveryone there had done the same math I had. That was the first thing I noticed.\n\n### 🥟 Scallion Pancake Rolls — 葱花饼\n\nOriginal: ¥8 → ¥4.80 | Saved: ¥3.20\n\nTwo rolls, about 200g. This is what most Chinese adults eat for breakfast — these rolls plus a ¥4 carton of milk. Thin dough, scallion filling, crispy outside, chewy inside. The kind of thing that smells like someone’s actual kitchen. My wife grew up eating these. I didn’t think twice about grabbing them.\n\n### 🥩 Braised Pork with Preserved Mustard Greens — 梅菜扣肉\n\nOriginal: ¥13.90 → ¥8.30 | Saved: ¥5.60\n\nClassic Cantonese home dish. Fatty pork steamed until silky and tender — it sounds heavy but it’s not greasy. Paired with salty-sweet preserved mustard greens that absorb every bit of the meat juice. You eat it over rice and the rice gets flavored by the sauce that runs off. My mother made this on weekends. I’ve eaten it my whole life.\n\nAt ¥8.30, this was the item I was most pleased about. A dish like this in any Western city would be $15–18 at a restaurant. Here it’s ¥8.30 at the end of the day in a supermarket. This single item, in my view, was worth most of the wait.\n\n### 🥗 Nanjing Mixed Vegetables — 什锦菜\n\nOriginal: ¥11.90 → ¥7.10 | Saved: ¥4.80\n\nA traditional dish from Nanjing — originally served at New Year, now eaten year-round. Over 10 kinds of vegetables, fungus, and tofu products, mixed together cold. Fresh, crisp, slightly savory. We eat this to cut through the richness of a meal with a lot of meat — the original “palette cleanser” before that term existed. Good for a few days in the fridge.\n\n### 🐟 Crispy Deep-Fried Fish — 特色炸鱼\n\nOriginal: ¥15.90 → ¥9.50 | Saved: ¥6.40\n\nSmall whole fish, coated in breadcrumbs, deep-fried to a golden crust. Crispy outside, juicy inside. At this size there’s no bone problem — you eat the whole thing. Salt, pepper, sometimes chili. My son eats these like snacks. Nearly 40% off at 8pm.\n\n### 🍱 Box Lunch — 特色快餐盒饭\n\nOriginal: ¥15.90 → ¥9.50 | Saved: ¥6.40\n\nRice, two cooked meat dishes, one stir-fried vegetable. That’s a full meal for ¥9.50 — roughly $1.30 USD. This is what Chinese office workers and students eat for lunch across the country, every day. Before the discount it’s already cheap. After 8pm it becomes almost difficult to argue with.\n\nFor anyone outside China reading this: yes, that number is correct.\n\n### 🍣 Fresh Supermarket Sushi — 日式寿司\n\nOriginal: ¥35.80 → ¥21.50 | Saved: ¥14.30\n\nMade fresh in the supermarket every day. Raw fish, crab stick, cucumber, avocado, seasoned rice, wrapped in seaweed. Cold, light, clean-tasting. I’ve eaten enough supermarket sushi over the years that I don’t think twice about it anymore — but every time I explain the price to someone outside China, there’s a pause.\n\n¥21.50 for a fresh sushi platter. That’s about $3. The ¥14.30 saving here was the second-biggest single item of the night. At this point I was doing the math in my head and starting to feel more confident about how the argument was going to end.\n\n### 🍱 Japanese Bento Box — 日式便当\n\nOriginal: ¥40 → ¥24 | Saved: ¥16.00\n\nThe biggest single saving of the night. ¥16 off one item. A premium bento — rice, multiple dishes, careful presentation — for ¥24. When I saw this one go on discount, I knew the math was going to work out.\n\n### 🥟 Handmade Dumplings — 东北饺子\n\nOriginal: ¥7 → ¥5.60 | Saved: ¥1.40\n\nMade by hand inside the supermarket. A single-serving portion. Take home, boil five minutes, eat. I buy these for my son. He calls them “the lazy dinner option.” He’s not wrong — they taste like someone made them for you, because someone did, a few hours ago.\n\n## The Final Count\n\n| Item | Saved |\n|---|---|\n| Scallion pancake rolls | ¥3.20 |\n| Braised pork | ¥5.60 |\n| Mixed vegetables | ¥4.80 |\n| Crispy fish | ¥6.40 |\n| Box lunch | ¥6.40 |\n| Fresh sushi | ¥14.30 |\n| Bento box | ¥16.00 |\n| Dumplings | ¥1.40 |\nTotal savings |\n¥58.10 |\n\nCost of waiting: **¥42.17**\n\nSavings from waiting: **¥58.10**\n\nNet: **+¥15.93 in my favor.**\n\nI was right. The AI confirmed it. It didn’t rain.\n\nI showed my wife the calculation. She looked at it. She didn’t say I was wrong.\n\nThen she said: *“But I waited at home for an hour.”*\n\nAnd I didn’t have a number for that.\n\n## What AI Actually Told Me (That I Didn’t Ask For)\n\nI’d sent the AI the photos to settle a financial argument. It settled it. ¥58.10 saved versus ¥42.17 in time-and-risk cost. Math done.\n\nBut then it added something I hadn’t asked for.\n\nIt noted that the calculation covered the monetary cost of waiting — but not the cost of the disagreement itself. Not the hour my wife spent at home. Not the mood of the evening. Not what “I was waiting for you” actually meant to her while I was standing in a supermarket aisle watching a bento box get a discount sticker.\n\n“You’ve answered whether the discounts justified the wait economically,” it said, more or less. “That’s a different question from whether the decision was worth making without telling her first.”\n\nI stood there reading that with the bags still in my hands.\n\nI thought I was going to get a clean win. Instead I got the right answer to the wrong question — and a mirror pointed at the question I’d actually missed.\n\n## The Other Thing I Noticed (That Has Nothing to Do With My Wife)\n\nWhile I was waiting, I walked past the supermarket’s food court. Packed. Every seat taken. People eating supermarket-prepared food for ¥9–16 a meal.\n\nThen I walked past the mall’s restaurant floor on the way out. Nearly empty. A few tables. Staff standing around. Restaurants that charge ¥35+ per person, in the same building, on the same evening.\n\nI don’t know exactly what this means at a macro level. But I see it consistently. The supermarkets with prepared food sections are busy. The sit-down restaurants aren’t. People are still eating out — they’re just making different calculations about what “eating out” means when a complete meal costs ¥9.50 thirty meters away from a table that costs four times that.\n\nNobody told them to do this. They just did the math.\n\n## What I Actually Brought Home\n\nEgg tarts, bread, shrimp, steamed buns, ground pork, and — yes — a spaghetti bolognese mix from an Italian brand sold in a Chinese supermarket. Everything had a red discount tag. My wife called the spread “chaotic.” She ate the braised pork over rice that evening and said it was good.\n\nWe didn’t argue about it again.\n\nBut I did text her before I went to the supermarket the following week.\n\nAnd I went at 7:50 instead of 7:00.\n\nThe AI had one more opinion about that, too: *“Getting there 10 minutes before the discount is more efficient than waiting 60. Same savings. Less friction.”*\n\nIt was right about that one too.\n\n## The Part That’s Stayed With Me\n\nBefore this experiment, I thought I was going to ask AI to compare prices and hand me a number.\n\nWhat I actually got was: the right answer to a question I hadn’t realized I was asking.\n\nThe grocery math was easy. The AI did it in seconds. The number said I was right, and I was. But the more useful thing it did was show me what the argument was *actually* about — which wasn’t whether sushi costs ¥21.50 or ¥35.80.\n\nMy wife wasn’t disputing the discounts. She was asking whether I’d considered her time the same way I’d calculated mine.\n\nAI didn’t answer that question. It just made sure I couldn’t ignore it.\n\nThat’s not what I expected from a grocery calculation. It’s the part I keep thinking about.\n\n**AI didn’t replace my judgment. It slowed me down enough to use it.**\n\n*I’m running a live experiment: building an English blog from zero, tracking every number publicly, writing about what actually happens when an ordinary person tries to use AI for real life decisions — not productivity advice, just what actually happens. The full story is here, updated weekly.*\n\n## Related Reading\n\n[I Built This Blog in 4 Days Using AI — And Now I’m Running a Live Experiment in Public](https://ordinarymantrying.com/building-in-public-experiment/)[From 30MB of Word Files to a 400KB App: How AI Changed My Son’s English Study](https://ordinarymantrying.com/ai-gaokao-english-study-app/)[Mind Traps Quiz — Test Your Cognitive Biases (Free)](https://ordinarymantrying.com/tools/mind-traps.html)\n\n## Want to Test Your Own Decision-Making Biases?\n\nThe reason my wife and I disagreed wasn’t really about the price of sushi. It was about how differently we were framing the same situation — what economists call anchoring and loss aversion. 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