Earlier quoted context omitted.
I claim that all of thinking can be reduced to predicting the next thing. Predicting the next thing = thinking in the same way that reading and writing strings of bytes is a universal interface, or every computation can be done by a Turing machine.
People can claim whatever they like. That doesn't mean it's a good or reasonable hypothesis (especially for one that is essentially unfalsifible like predictive coding).
My claim is that the two concepts are indistinguishable, thus equivalent. The unfalsifiability is what makes it a natural equivalence, the same as in the other examples I gave.