A neuroscientist once flashed the picture of a chicken claw to the left half of a split-brain patient’s brain, and a snowy winter scene to the right half. Then he asked the man to point at pictures matching what he’d seen. The patient’s right hand pointed at a chicken. His left hand pointed at a shovel.
“Why the shovel?” the scientist asked.
The patient never hesitated: “The chicken claw goes with the chicken, and you need a shovel to clean out the chicken shed.”
He was wrong. The shovel was in the snowy scene — his talking brain had never seen it. But it preferred a wrong story to no story at all.
Sahil Bloom pointed me to this research in this week’s Curiosity Chronicle, and it landed like a brick. Neuroscientist Michael Gazzaniga, who ran these experiments for decades, called the guilty party The Interpreter: a system in the brain whose entire job is to take scattered, half-understood facts and stitch them into a coherent story that feels true. His punchline applies to all of us, even those of us with intact brains: you wrote the stories. Which means you can rewrite them.
Here’s the version of that nobody tells you: The Interpreter doesn’t just run on split-brain patients. It runs on your money. I have talked about this in the past — the importance of understanding the psychology quietly steering your financial decisions — and the Interpreter is the same machinery running underneath all of it.
The three stories costing Canadians the most
1. “I’m just bad with money.”
This is the heavyweight champion of money stories. It sounds like humility. It functions like a licence. Once you’ve decided you’re bad with money, every bounced transfer and impulse purchase just confirms the story — the Interpreter diligently collects the evidence and ignores the counter-evidence. The time you paid off your credit card in full? Conveniently forgotten. The three months you stuck to a budget? A fluke.
Notice what’s happening: the story isn’t a conclusion from the data. It’s the lens that filters the data. And it’s expensive. A person who believes they’re bad with money won’t bother automating a TFSA contribution, because “what’s the point, I’ll just mess it up.” One skipped automation can be worth tens of thousands over a career — not because of genius, but because the story made consistency feel impossible.
2. “Investing is just gambling / I’ll lose it all.”
Usually this story was written by a single scene: someone’s uncle lost money on a stock tip, or the person themselves bought a hot ETF in 2021, sold in the 2022 dip, and never came back. The Interpreter took that one data point and wrote a whole novel from it.
But the novel skipped the rest of the library. It didn’t mention that the loss came from buying high and selling low — the exact behaviour the story is now preventing you from unlearning. It didn’t mention the alternative the person chose instead: sitting in cash while inflation did its quiet work. The story frames “doing nothing” as safe. Over thirty years, doing nothing has its own price tag, and it’s not zero.
3. “I don’t make enough to save.”
Sometimes this story is true. Let’s be honest about that up front — more on the caveat below.
But often the story is written before anyone has done the arithmetic. I know the pattern: coffee and lunch at work, $11–$12 a day, five days a week. That’s roughly $240 a month, $2,900 a year. Now imagine the alternative story: “I’m someone who pays myself first.” That person sets up an automatic $100-a-month transfer to their TFSA on payday. They still buy lunch three days a week. They still spend money on coffee. They just no longer believe the story that there was nothing to work with.
The first story says the math is impossible, so why bother. The second story says the math is tight, so automate the small thing. Same paycheque. Different Interpreter.
How to rewrite a money story
The fix isn’t affirmations. The Interpreter laughs at affirmations. The fix is evidence — you have to feed the storytelling machine new data until it can’t sustain the old story anymore. Here’s the exercise:
Step 1: Write the story down, verbatim. Not the polite version. The real one: “I’m the kind of person who will never have enough.” Seeing it in writing does something seeing it in your head can’t — it turns a background hum into a sentence you can argue with.
Step 2: Find one counter-example. Just one. A month you didn’t overspend. A debt you did pay down. A bill you’ve never missed. The Interpreter built its case on a highlights reel of your failures; show it the footage it left on the cutting-room floor.
Step 3: Write the replacement story in past tense, as a fact. Not “I will become a saver” — the Interpreter files future tense under fiction. Write: “I’m someone who moves $100 to my TFSA every payday.” Present tense. Behavioural. Boring. The more boring, the more believable.
Step 4: Automate one tiny behaviour that proves it. This is the crucial part. The story changes fastest when the body moves first. An automatic transfer of even $50 a month, timed to payday, is the Interpreter-proof answer: a behaviour that happens whether you “believe” the new story or not. After a few months, the story catches up to the evidence. It always does — that’s its job.
The honest caveat
A rewritten story doesn’t change the price of groceries in Toronto. It doesn’t raise your wage or erase a $40,000 debt or make childcare affordable. If money is genuinely tight — and for plenty of Canadians right now, it is — the problem isn’t your narrative. Telling someone in a real cash crunch that they need a better story is condescending and wrong.
But if there’s any room in the numbers — if the money exists and keeps leaking through the gaps in a story you wrote years ago — then the story is the thing standing between you and it. Plenty of people with decent incomes are broke on a story. Plenty of people with modest incomes are doing fine on a better one.
Also worth saying: if your money anxiety is severe — sleepless nights, panic, compulsive spending you can’t stop — that’s beyond what a blog exercise can touch. Talk to a professional, a fee-only financial planner, or your doctor. Rewriting stories is a tool, not therapy.
The takeaway
Gazzaniga’s patient never found out about the chicken shed. Nobody corrected him, because the point of the experiment wasn’t whether he was right — it was that his brain would rather invent a story than sit with “I don’t know.”
Your Interpreter is doing the same thing with your finances every single day. The question isn’t whether it’s running. It’s whether the story it’s running is one you chose — or one you inherited and never checked.
So check it. Write down the money story you’re telling yourself. Find the counter-evidence. Write a boring, behavioural replacement. Then automate one small proof and let the machine do the rest.
You wrote the story. Which means you can rewrite it. That’s not motivational fluff — it’s neuroscience.