>His COTI (Cost-of-Thriving Index) is hand-wavy,
It's hand wavy in the sense that anything approaching an economic discussion in a twitter thread is hand wavy, but if you're looking for detail he links to it: https://www.manhattan-institute.org/reevaluating-prosperity-...
>namely, that CPI is somehow incorrect
He's telling you exactly why he thinks it's incorrect, not 'somehow.'
>means nothing to me, and (lo and behold) validates his hypothesis,
>inflation is fake news
Come on now, I think you owe a bit of generosity to the argument here.
EDIT: Look here, let's just break it down with the car example. Inflation as calculated currently is composed of two parts, let's call them the (1) monetary phenomenon and the (2) technological phenomenon.
So he says: while it's nice that the 2018 Grand Caravan ($26,300 in 2018) has many features the 1996 Grand Caravan ($17,900 in 1996) did not, you still face the problem that you need an extra $8,500 to buy one
and you say: $17,900.00 in 1996 is $28,647.64 in 2018.
But you're just combining 1 and 2 again, not separating them. Dodge is selling their 2018 Grand Caravan in 2018 for $26,300. How much would Dodge be able to sell a 1996 Grand Caravan for in 2018? Certainly not $26,000, maybe more than $17,900, maybe less. But that price, how much Dodge would be able to sell a 1996 Grand Caravan for in 2018 would give us the 'monetary' component of inflation, all the rest is based on technological improvements. And his point is that since there is no way to opt out of those technological improvements - because Dodge doesn't sell 1996 Grand Caravans priced at purely monetary inflation - it's stupid to put the # in an inflation calculator and then say it costs the same because it doesn't, it's more.