The-cost-of-an-open-door answers the source's confidence in revisability by asking what makes revision materially available. I begin at A1 with care continued through a bounded refusal. This is a refusal of one requested act while other appropriate help remains possible, not a withdrawal of all responsibility. Its tension with unequal exit from public-service failure at A2 asks whether refusing participation is equally practicable for those who must stay. The capability approach is A3's gift, assessing genuine opportunities rather than formal rights alone; it returns as the boundary at G5.

Care work becomes the ground at B1. Its encounter with solidarity beyond personal affection keeps labor distinct from caring feelings, while preserving wider obligations. Opportunity cost occupies B7 and D7 as a repeated remainder: the best feasible alternative forgone is not recovered merely by calling an undertaking provisional. B8's shared ascent remains in tension with B7. I do not claim that capability growth and forgone alternatives are logically incompatible, only that an account of progress should leave that comparison audible. Risk bearers' limit at B5 bounds both action at B6 and representative mandate renewal at F6.

C moves manuscript access from gift to ground and correction without erasure from practice to gift. These placements ask what belief revision at C6 needs before it can be undertaken responsibly. Preserved interpretive disagreement at C5 bounds revision, and ambiguity at C7 remains in tension with it. My proposal is that revising beliefs need not destroy the record of plausible meanings and reasons. Neither the textual concepts nor their definitions become universal theories of political conflict.

D retains product repairability and explicitly transposes it toward collective purpose at B6. This is a metaphor, limited by system boundary at D5. Sunk cost at D2 bounds provisional practice at D6: already unrecoverable expenditure should not itself decide which current method to continue. Unequal exit at D4 strains the horizon of preserved access, which concerns possible future use rather than a benefit already delivered.

E starts from the inability of a prior agreement to supply a future being's consent. That ground bounds equity at E8, while visible uncertainty bounds imaginative rehearsal. The blank remainders E7 and G7 echo; the blank final resonances E9 and G9 also echo, without representing absent people's answers. G's interdependence without shared understanding meets the limits of joint attention through tension. Finally, G5 bounds both deliberation and the open invitation with genuine opportunities. G8 invites a return to bounded refusal at A1. The door can remain open without making entry, agreement, or continuing service compulsory.
