The attacker is not buying destruction: he is buying defensive consumption. And the defender does not lose through accounting ruin, but when forced expenditure invades the reserve he had committed.
Notes
Analyses and essays. Where a piece computes, the model runs here rather than being described — the reader moves the anchor and watches the measure redraw.
Tractable is not predictable: determinism and tractability belong to the model and depend on the engineer; predictability belongs to the world and is never promised.