diff --git a/web/world/js/tests/d.test.js b/web/world/js/tests/d.test.js
index a97e913..d6905d0 100644
--- a/web/world/js/tests/d.test.js
+++ b/web/world/js/tests/d.test.js
@@ -1414,8 +1414,22 @@ export default async function run(t) {
       'the carport BEAM is bracket work — a knife cannot reach it, and having no time to fetch the '
       + 'ladder is the emergency\'s whole premise');
     assert(!cuttable(corners[3], YARD.anchor('cb1')), 'cuttable() states the same rule directly');
-    // and the read says WHICH TOOL, rather than going silent — the greyed-prompt rule, S13
-    assert(/ladder/.test(K.read().whyNot ?? ''), 'the refusal names the tool it would need');
+
+    /**
+     * THE REFUSAL SAYS WHICH OF THE TWO REASONS IT IS, and this pin exists because playing it
+     * caught the version that did not: one constant that always blamed the bracket, so on a yard
+     * with no bracket in the quad the game told me to fetch a ladder for a corner that does not
+     * exist. `needsLadder`'s own SPRINT10 disease — a rule keyed on the wrong thing, failing
+     * plausibly — on the surface built to explain it.
+     */
+    assert(/cleat|strop/.test(K.read().whyNot ?? ''),
+      `standing at the beam with two posts still up, the answer is WALK: ${K.read().whyNot}`);
+    const bracketOnly = fakeRig([
+      { anchorId: 'cb1', broken: false, hw: { name: 'shackle', cost: 15, rating: 3200 } },
+    ]);
+    const K2 = knifeAt(p, bracketOnly);
+    assert(/bracket/.test(K2.read().whyNot ?? ''),
+      `with every live corner up a wall, the answer is that the knife cannot reach it: ${K2.read().whyNot}`);
 
     // out of range of everything: still a sail, still no cut
     p.pos.x = 0; p.pos.z = 0;