Seriously, I posted a link to the BLS itself that discusses substitution.
Because his POINT had to do with substitution.
And, substitution is part of the calculation of the current CPI.
Not as much as the chained cpi, that democrats are begging Obama not to use, but the current cpi formula includes the concept of substitution.
It results in a lower cost than the older method.
Inflation, as calculated by the Fed, uses core inflation numbers, and it does exclude food and energy.
So, whichever way you turn, I get to smile.