If you actually stop and think about it for a couple seconds, you should realize immediately that a “secret” inflation rate of 10% is impossible. You can lie about that for a month or two, but 10% annual inflation means prices double every 7 years, which is obviously not what we observe.

> prices double every 7 years, which is obviously not what we observe.

It’s not? The first two things that came to mind to check are almost exactly doubled:

Case-Schiller for Seattle metro area for example is almost exactly double: https://fred.stlouisfed.org/series/SEXRNSA/

Price of eggs is almost exactly double: https://fred.stlouisfed.org/series/APU0000708111

It may not be what you observe, but frankly, prices doubling at a 7-year rate sounds a lot like what's actually happening.