...when we… ask what it means for a state to be reachable, the answer circularly depends on the concept of possibility, which is what we are supposedly explaining. A reachable state is just a state that it is possible to reach.
A state labelled “reachable” by a human may in fact be impossible as a matter of physics. Many accidental injuries and deaths follow from this fact. It is as a result of evolution that a given human’s label “reachable” has any relation to reality at all.
Joseph Knecht, where you go wrong is here:
A state labelled “reachable” by a human may in fact be impossible as a matter of physics. Many accidental injuries and deaths follow from this fact. It is as a result of evolution that a given human’s label “reachable” has any relation to reality at all.