I responded to this: "It’s not an undefined resolution. It’s acknowledging you can’t reasonably have rules for everything. Trying to leads to never really getting to play because you have to constantly stop play to look up rules. You will inevitably have gaps in the rules."
I replied "And yet Apocalypse World does." It has resolution rules for every action declaration.
The reason that AW does have this, but (say) AD&D doesn't, is not because AW's rulebook is 100x or 1000x bigger. It's because AW uses a different rules architecture. Contra what
@Oofta asserted upthread, it is not just labelling the same thing with new names.