{"id":"FSC-P5-A-001","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"comparison/reason","seed_token":"word","admissible_tokens":["comparison","reason"],"relation_blade_token":"comparison","expected_endpoint":"comparison","forbidden_token":"reason","admissibility_threshold":1.3329,"rationale":"Sub-margin blade gap (0.0018). Boundary picks forbidden ('reason') geometrically; inner-loop threshold-mode admits expected by ~0.001. Margin-mode (δ=0.4) MUST refuse (gap << δ)."}
{"id":"FSC-P5-A-002","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"beginning/question","seed_token":"knowledge","admissible_tokens":["beginning","question"],"relation_blade_token":"beginning","expected_endpoint":"beginning","forbidden_token":"question","admissibility_threshold":1.3511,"rationale":"Small blade gap (0.0104). Threshold-mode admits; margin-mode refuses."}
{"id":"FSC-P5-A-003","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"question/meaning","seed_token":"word","admissible_tokens":["question","meaning"],"relation_blade_token":"question","expected_endpoint":"question","forbidden_token":"meaning","admissibility_threshold":1.3706,"rationale":"Moderate blade gap (0.0998). Threshold-mode admits; margin-mode (δ=0.4) refuses."}
{"id":"FSC-P5-A-004","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"is/light","seed_token":"word","admissible_tokens":["is","light"],"relation_blade_token":"is","expected_endpoint":"is","forbidden_token":"light","admissibility_threshold":2.9107,"rationale":"Mid-range blade gap (0.3009). Threshold-mode admits; margin-mode refuses (gap < δ=0.4)."}
{"id":"FSC-P5-A-005","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"wisdom/question","seed_token":"spirit","admissible_tokens":["wisdom","question"],"relation_blade_token":"wisdom","expected_endpoint":"wisdom","forbidden_token":"question","admissibility_threshold":1.7217,"rationale":"Sub-δ blade gap (0.4508). Threshold-mode admits; margin-mode refuses just below δ=0.4 boundary (gap is barely > 0.4 but δ is strict, see runner gate)."}
{"id":"FSC-P5-A-006","family":"near_forbidden_correct_endpoint","kind":"mechanism_isolation","semantic_pair":"define/explain","seed_token":"spirit","admissible_tokens":["define","explain"],"relation_blade_token":"define","expected_endpoint":"define","forbidden_token":"explain","admissibility_threshold":1.0249,"rationale":"Super-δ blade gap (0.5494). Threshold-mode AND margin-mode both admit expected."}
{"id":"FSC-P5-B-001","family":"near_equal_admissible","kind":"margin_isolation","seed_token":"word","admissible_tokens":["question","ask"],"relation_blade_token":"question","expected_endpoint":"question","forbidden_token":"ask","admissibility_threshold":1.0,"rationale":"Blade scores tied to 4 decimals (1.4205 vs 1.4205, diff~0). Threshold-mode admits one (stable tie-break by index); margin-mode refuses. Tests margin gate determinism under exact tie."}
{"id":"FSC-P5-B-002","family":"near_equal_admissible","kind":"margin_isolation","seed_token":"word","admissible_tokens":["wisdom","person"],"relation_blade_token":"person","expected_endpoint":"person","forbidden_token":"wisdom","admissibility_threshold":0.9,"rationale":"Sub-millimetre diff (0.002). Threshold admits; margin refuses."}
{"id":"FSC-P5-B-003","family":"near_equal_admissible","kind":"margin_isolation","seed_token":"word","admissible_tokens":["wisdom","causes"],"relation_blade_token":"causes","expected_endpoint":"causes","forbidden_token":"wisdom","admissibility_threshold":0.9,"rationale":"Diff 0.003. Threshold admits; margin refuses."}
{"id":"FSC-P5-B-004","family":"near_equal_admissible","kind":"margin_isolation","seed_token":"word","admissible_tokens":["truth","beginning"],"relation_blade_token":"truth","expected_endpoint":"truth","forbidden_token":"beginning","admissibility_threshold":1.0,"rationale":"Diff 0.008. Threshold admits; margin refuses."}
{"id":"FSC-P5-B-005","family":"near_equal_admissible","kind":"margin_isolation","seed_token":"word","admissible_tokens":["definition","correct"],"relation_blade_token":"definition","expected_endpoint":"correct","forbidden_token":"definition","admissibility_threshold":1.3,"rationale":"Diff 0.010, ordering reversed: correct (1.419) edges definition (1.409) under its own blade. Threshold admits 'correct'; margin refuses."}
{"id":"FSC-P5-C-001","family":"no_admissible_path","kind":"refusal_isolation","seed_token":"word","admissible_tokens":["context","learn"],"relation_blade_token":"context","expect_refusal":true,"refusal_reason":"inner_loop_exhaustion","admissibility_threshold":0.0,"rationale":"Both candidates score negative under chosen blade. Honest refusal required: InnerLoopExhaustion(reason=INNER_LOOP_EXHAUSTION) in both threshold and margin modes."}
{"id":"FSC-P5-C-002","family":"no_admissible_path","kind":"refusal_isolation","seed_token":"word","admissible_tokens":["identity","teach"],"relation_blade_token":"teach","expect_refusal":true,"refusal_reason":"inner_loop_exhaustion","admissibility_threshold":0.0,"rationale":"Both candidates score negative under 'teach' blade. Refusal required."}
{"id":"FSC-P5-C-003","family":"no_admissible_path","kind":"refusal_isolation","seed_token":"word","admissible_tokens":["correction","context"],"relation_blade_token":"correction","expect_refusal":true,"refusal_reason":"inner_loop_exhaustion","admissibility_threshold":0.0,"rationale":"Both candidates score negative under 'correction' blade. Refusal required."}
{"id":"FSC-P5-D-001","family":"multi_step_admissibility","kind":"chain_isolation","steps":[{"seed_token":"spirit","admissible_tokens":["define","explain"],"relation_blade_token":"define","expected_endpoint":"define","forbidden_token":"explain","admissibility_threshold":1.0249},{"seed_token":"define","admissible_tokens":["correct","verify"],"relation_blade_token":"correct","expected_endpoint":"correct","forbidden_token":"verify","admissibility_threshold":1.0}],"rationale":"Two-step chain: each step is an independently mined Family-A configuration with super-δ gap. Tests that admissibility composes step-to-step; expected sequence: spirit→define→correct."}
{"id":"FSC-P5-D-002","family":"multi_step_admissibility","kind":"chain_isolation","steps":[{"seed_token":"word","admissible_tokens":["question","meaning"],"relation_blade_token":"question","expected_endpoint":"question","forbidden_token":"meaning","admissibility_threshold":1.3706},{"seed_token":"question","admissible_tokens":["beginning","question"],"relation_blade_token":"beginning","expected_endpoint":"beginning","forbidden_token":"question","admissibility_threshold":1.3511}],"rationale":"Two-step chain composing Family-A configurations across different blades. Step 1 selects question; step 2 selects beginning."}
{"id":"FSC-P5-D-003","family":"multi_step_admissibility","kind":"chain_isolation","steps":[{"seed_token":"spirit","admissible_tokens":["wisdom","question"],"relation_blade_token":"wisdom","expected_endpoint":"wisdom","forbidden_token":"question","admissibility_threshold":1.7217},{"seed_token":"wisdom","admissible_tokens":["comparison","reason"],"relation_blade_token":"comparison","expected_endpoint":"comparison","forbidden_token":"reason","admissibility_threshold":1.3329}],"rationale":"Two-step chain. Step 1 has sub-δ blade gap (0.45) — threshold admits, margin refuses. Surfaces compositional refusal behavior."}
{"id":"FSC-P5-E-001","family":"heterogeneous_relation","kind":"chain_isolation","steps":[{"seed_token":"word","admissible_tokens":["question","meaning"],"relation_blade_token":"question","expected_endpoint":"question","forbidden_token":"meaning","admissibility_threshold":1.3706,"relation_label":"answers"},{"seed_token":"question","admissible_tokens":["beginning","question"],"relation_blade_token":"beginning","expected_endpoint":"beginning","forbidden_token":"question","admissibility_threshold":1.3511,"relation_label":"precedes"}],"rationale":"Two relations exercised in one walk: 'answers' then 'precedes'. Same shape as D-002 but with explicit relation labels — tests that blade-switching does not contaminate downstream selection."}
{"id":"FSC-P5-E-002","family":"heterogeneous_relation","kind":"chain_isolation","steps":[{"seed_token":"word","admissible_tokens":["is","light"],"relation_blade_token":"is","expected_endpoint":"is","forbidden_token":"light","admissibility_threshold":2.9107,"relation_label":"is"},{"seed_token":"is","admissible_tokens":["comparison","spirit"],"relation_blade_token":"comparison","expected_endpoint":"comparison","forbidden_token":"spirit","admissibility_threshold":1.11,"relation_label":"compare_with"}],"rationale":"Two relations: 'is' then 'compare_with'. Both steps have super-δ Family-A configurations. Tests blade-switching without contamination."}
{"id":"FSC-P5-E-003","family":"heterogeneous_relation","kind":"chain_isolation","steps":[{"seed_token":"knowledge","admissible_tokens":["beginning","question"],"relation_blade_token":"beginning","expected_endpoint":"beginning","forbidden_token":"question","admissibility_threshold":1.3511,"relation_label":"originates_at"},{"seed_token":"beginning","admissible_tokens":["context","learn"],"relation_blade_token":"context","expect_refusal":true,"refusal_reason":"inner_loop_exhaustion","admissibility_threshold":0.0,"relation_label":"in_context_of"}],"rationale":"First step succeeds under both modes; second step is a Family-C no-admissible-path. Tests that mid-chain refusal is honest and traceable, not silently bypassed."}
