Ah, what I meant to say was that if Alice and Bob’s “natural” beliefs disagree, and this makes Alice consider averaging her beliefs toward Bob, but Bob isn’t thinking about doing that, then the TDT-type argument can’t be justifying Alice. Even though the TDT argument is about “selfish” gains, its conditions must not be met if Bob isn’t thinking in the same way. I’ll try to edit for clarity.
Ah, what I meant to say was that if Alice and Bob’s “natural” beliefs disagree, and this makes Alice consider averaging her beliefs toward Bob, but Bob isn’t thinking about doing that, then the TDT-type argument can’t be justifying Alice. Even though the TDT argument is about “selfish” gains, its conditions must not be met if Bob isn’t thinking in the same way. I’ll try to edit for clarity.