diff --git a/lib/mocks/confidence-engine/mock-client.js b/lib/mocks/confidence-engine/mock-client.js
index b64d46c..b874dd4 100644
--- a/lib/mocks/confidence-engine/mock-client.js
+++ b/lib/mocks/confidence-engine/mock-client.js
@@ -112,29 +112,12 @@ var T4_nodes = [
 ];
 var T4_edges = [mkEdge("e-1","obs-1","state-1"),mkEdge("e-2","obs-2","state-1"),mkEdge("e-3","rel-1","u-1"),mkEdge("e-4","obs-3","u-1"),mkEdge("e-5","rel-1","u-2"),mkEdge("e-6","obs-4","u-2"),mkEdge("e-7","obs-4","u-3"),mkEdge("e-8","obs-5","u-3"),mkEdge("e-9","rel-1","u-4"),mkEdge("e-10","obs-6","u-4")];
 
-var T5_nodes = [
-  mkNode("obs-1","Complaints increased by 35%",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("obs-2","Production increased by 40%",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("obs-3","Both figures cover the same three-month period",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("obs-4","Complaints rose from 100 to 135; production rose from 1,000 to 1,400 units",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("obs-5","The complaint rate fell from 10 per 1,000 to about 9.6 per 1,000",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("obs-6","Same complaint categories and reporting rules were used throughout",{kind:"observation",status:"known",confidence:"high"}),
-  mkNode("state-1","Current situation",{kind:"state",status:"provisional",confidence:"medium"}),
-  mkNode("rel-1","Complaint and production trends are related",{kind:"relationship",status:"known",confidence:"medium"}),
-  mkNode("u-1","Whether the two figures cover the same period",{status:"resolved",confidence:"high"}),
-  mkNode("u-2","Whether the percentage changes use comparable baselines",{status:"resolved",confidence:"medium"}),
-  mkNode("u-3","Whether complaints increased faster than production on a per-unit basis",{status:"resolved",confidence:"high"}),
-  mkNode("u-4","Whether reporting practices changed",{status:"resolved",confidence:"high"})
-];
-var T5_edges = [mkEdge("e-1","obs-1","state-1"),mkEdge("e-2","obs-2","state-1"),mkEdge("e-3","rel-1","u-1"),mkEdge("e-4","obs-3","u-1"),mkEdge("e-5","rel-1","u-2"),mkEdge("e-6","obs-4","u-2"),mkEdge("e-7","obs-4","u-3"),mkEdge("e-8","obs-5","u-3"),mkEdge("e-9","rel-1","u-4"),mkEdge("e-10","obs-6","u-4")];
-
 var TURNS = [
   { nodes:T0_nodes, edges:T0_edges, resolved:[], active:"u-1", question:{ nodeId:"u-1", question:"Were the complaint and production figures measured over the same period?", reason:"If the figures cover different periods, comparing their movement could be misleading.", reasoningPattern:"comparability_check" }, noQReason:null, summary:"Two changes have been reported, but we do not yet know whether the figures are directly comparable." },
   { nodes:T1_nodes, edges:T1_edges, resolved:["u-1"], active:"u-2", question:{ nodeId:"u-2", question:"Were both percentages calculated from comparable baseline counts?", reason:"Establishing the reference point for both figures is essential before evaluating their relationship.", reasoningPattern:"baseline_comparability" }, noQReason:null, summary:"The timing basis is now clear." },
   { nodes:T2_nodes, edges:T2_edges, resolved:["u-1","u-2"], active:"u-3", question:{ nodeId:"u-3", question:"Did the complaint rate per unit produced improve or worsen?", reason:"Absolute changes in complaints and production are known; the relative rate determines whether the situation improved.", reasoningPattern:"rate_comparison" }, noQReason:null, summary:"The absolute baselines are now known." },
   { nodes:T3_nodes, edges:T3_edges, resolved:["u-1","u-2","u-3"], active:"u-4", question:{ nodeId:"u-4", question:"Was there any change in how complaints were recorded during the period?", reason:"The per-unit rate changed; we need to rule out recording artifacts before concluding a genuine shift.", reasoningPattern:"artifact_exclusion" }, noQReason:null, summary:"The per-unit complaint rate improved slightly." },
-  { nodes:T4_nodes, edges:T4_edges, resolved:["u-1","u-2","u-3","u-4"], active:null, question:null, noQReason:"Additional external evidence is required before another justified question can be selected.", summary:"The available evidence has reached its current limit." },
-  { nodes:T5_nodes, edges:T5_edges, resolved:["u-1","u-2","u-3","u-4"], active:null, question:null, noQReason:"All required investigation areas are resolved.", summary:"The figures cover the same period, use comparable baselines, show an improved complaint rate, and were recorded consistently." }
+  { nodes:T4_nodes, edges:T4_edges, resolved:["u-1","u-2","u-3","u-4"], active:null, question:null, noQReason:"All required investigation areas are resolved.", summary:"The figures cover the same period, use comparable baselines, show an improved complaint rate, and were recorded consistently." }
 ];
 
 /* ── fixture builders ─────────────────────────────────────── */
@@ -159,7 +142,7 @@ function buildUpdateFixture(scenarioName, idx) {
   if (scenarioName === "error") {
     return { success:false, stage:"provider", error:"Mock provider error: structured response unavailable.", providerErrors:["Mock provider error: structured response unavailable."], updatedSituationGraph:null, selectedQuestion:null, affectedNodeIds:[], resolvedUnknownNodeIds:[], changesApplied:null, summary:null, diagnostics:{ promptVersion:"v0.4", modelName:"mock-ollama", responseDurationMs:0 } };
   }
-  var f = scenarioName === "complete" ? buildDefaultFixture(5) : buildDefaultFixture(idx);
+  var f = scenarioName === "complete" ? buildDefaultFixture(4) : buildDefaultFixture(idx);
   return { success:true, stage:"update_applied", updatedSituationGraph:f.situationGraph, selectedQuestion:f.selectedQuestion, affectedNodeIds:[], resolvedUnknownNodeIds:(f.situationGraph.resolvedNodeIds||[]).slice(), changesApplied:{ addedNodeCount:0, updatedNodeCount:0, addedEdgeCount:0, removedEdgeCount:0 }, summary:f.situationGraph.currentSummary||null, diagnostics:f.diagnostics };
 }
 
@@ -189,7 +172,7 @@ function handleUpdateCase(data) {
     return Promise.resolve({ success:true, data:buildUpdateFixture("error",0) });
   });
   _turnIndex++;
-  var idx = scenarioName === "complete" ? 5 : Math.min(_turnIndex, 5);
+  var idx = scenarioName === "complete" ? 4 : Math.min(_turnIndex, 4);
   return delay(getDelay()).then(function() {
     return Promise.resolve({ success:true, data:buildUpdateFixture(scenarioName, idx) });
   });