The CPI isn't your grocery bill.
The headline says inflation is "cooling." Your cart says otherwise. This is why both can be true at once — the Consumer Price Index is an average basket, not your basket. What it actually measures is cited (BLS); the argument is labeled opinion.
What the CPI actually is (cited)
The Consumer Price Index is built by the U.S. Bureau of Labor Statistics from a "market basket" of goods and services meant to represent the spending of the average urban consumer. BLS is explicit that it's an average — your own experience can differ a lot depending on what you actually buy. One number, stretched across a whole country.
Source: U.S. Bureau of Labor Statistics, "Consumer Price Index" — bls.gov/cpi.
The number economists and the Fed lean on most — core CPI — excludes food and energy, because those swing wildly. Reasonable for spotting trends; brutal as a description of a real week, since groceries and gas are exactly where most people feel the squeeze. The official "core" rate can look calm while the freezer and the tank do not.
Source: BLS, core CPI (all items less food and energy) — bls.gov/cpi.
The method assumes that when beef jumps, you switch to chicken — substitution. The famous Boskin Commission (1996) argued this and quality changes made CPI overstate the cost of living. The street-level counter-argument is the opposite: trading down to survive isn't "no inflation," it's inflation you ate — and for rent, insulin, or gas, there's often nothing to substitute to. Contested in both directions; that's the honest part.
Sources: Boskin Commission, "Toward a More Accurate Measure of the Cost of Living" (1996); BLS CPI methodology — bls.gov/cpi.
The point (this part is opinion)
Here's the whole thing in one cart. A national index can say prices rose 3% — a real, useful number — and your actual month can still be up 9%, because you pay your rent, fill your tank, buy your kid the popsicles, fill your prescription. The index isn't lying; it's just not about you. It's the average of a country, and nobody lives at the average.
That's the museum's whole creed, in a receipt: a machine can compute the basket; only a human can feel the checkout. When a headline tells you inflation is "solved" and your gut says it isn't — trust the gut and read the source. Both can be true. Your lived cost is real data the average was never built to hold. Sister rooms: Why your portfolio can't vote, Why I support UBI, Where the money goes.