# Diagnostic Case: diag-05

Unexpected continuity — changed context but no outcome change.

## Input

```
Our production line changed suppliers three months ago but still delivers the same defect rate as before.
```

## Result

- **Technical**: ✅ PASS (1/4 sub-checks pass)
- **Reasoning Quality**: ❌ FAIL (0/2 sub-checks pass)
- **Actual Primary Type**: unexplained_change
- **Actual Reasoning Modes**: identify_difference, establish_baseline, validate_measurement
- **Response Duration**: 1ms

### Reasoning Quality Failures

missing required concept(s): supplier change, three months ago, same defect rate