# Test Failure Analysis

## Summary
- **Total Tests**: 591 (including new tests)
- **Passing**: 537 (93.4% pass rate)
- **Failing**: 43
- **Skipped**: 4
- **XFailed**: 3
- **XPassed**: 4

## Progress Since Ferguson Analysis
1. **Initial state**: 502/527 passing (95.3% of original tests)
2. **After DeMorgan rules**: 520/575 passing (90.4%)
3. **After bilateral equivalence**: 537/591 passing (93.4%)

## Failure Categories

### 1. New Test API Issues (21 failures)
**Files**: `test_acrq_demorgan.py`, `test_acrq_demorgan_simple.py`
**Issue**: Tests written with incorrect API (using `solve(mode="acrq")` which doesn't exist)
**Fix**: Update tests to use correct ACrQTableau API

### 2. Rule Verification Issues (6 failures)
**Test Classes**:
- `TestConjunctionRules` (2)
- `TestNegationRules` (2)
- `TestBranchingStructure` (2)

**Specific Failures**:
- `test_m_conjunction_meaningful_branching`
- `test_n_conjunction_nontrue_branching`
- `test_m_negation_general_elimination`
- `test_n_negation_general_elimination`
- `test_branch_count_verification`
- `test_branch_independence`

**Issue**: Tests expect specific branching behavior that may have changed with our fixes

### 3. Property-Based Test Failures (3 failures)
**Test Class**: `TestLogicalProperties`
**Failures**:
- `test_modus_ponens`
- `test_demorgan_laws_weak_kleene`
- `test_distribution_laws`

**Issue**: These test fundamental logical properties that may be affected by our changes

### 4. Ferguson Exact Compliance (3 failures)
**Test Classes**:
- `TestFergusonConjunctionRules::test_f_conjunction`
- `TestFergusonDisjunctionRules::test_t_disjunction`
- `TestFergusonImplicationRules::test_t_implication`

**Issue**: These were fixed but may have regressed or have test issues

### 5. Performance/Scalability (3 failures)
**Test Classes**:
- `TestScalabilityBenchmarks` (2)
- `TestMemoryEfficiency` (1)

**Failures**:
- `test_cnf_formula_performance`
- `test_branching_factor_control`
- `test_node_count_efficiency`

**Issue**: Performance regression or timeout issues

### 6. Semantic Validation (2 failures)
**Test Class**: `TestSemanticValidation`
**Failures**:
- `test_implication`
- `test_excluded_middle_fails`

**Issue**: Semantic evaluation may be inconsistent with tableau

### 7. Other Individual Failures (5 failures)
- `TestTableauSoundness::test_tautology_detection`
- `TestSignOperations::test_sign_negation_wkrq`
- `TestRuleNonApplication::test_empty_conjunction_disjunction`
- `TestQuantifierRules::test_quantifier_reapplication`
- `TestACrQDifferences::test_atomic_negation_handling`

## Priority Analysis

### High Priority (Fix Immediately)
1. **API Issues in new tests** - Easy fix, affects 21 tests
2. **Ferguson exact compliance** - Critical for correctness

### Medium Priority
1. **Rule verification failures** - Need to verify if our changes are correct
2. **Semantic validation** - Important for consistency

### Low Priority
1. **Performance issues** - Can be addressed later
2. **Property-based tests** - May need fundamental reconsideration

## Root Causes

### 1. Incomplete ACrQ Implementation
Despite adding DeMorgan rules and bilateral equivalence, some aspects remain:
- Quantifier DeMorgan rules may not be fully integrated
- Some edge cases in bilateral transformation

### 2. Test Assumptions
Many tests were written before Ferguson compliance:
- Expect old behavior (e.g., DeMorgan invalid)
- Don't account for bilateral equivalence

### 3. Performance Impact
Our additions (DeMorgan rules, bilateral equivalence checking) may have:
- Increased tableau size
- Added computational overhead

## Recommended Actions

### Immediate
1. Fix API issues in new DeMorgan tests
2. Verify Ferguson exact compliance tests
3. Check if rule verification tests need updating

### Short-term
1. Review semantic validation consistency
2. Optimize bilateral equivalence checking
3. Update tests to match Ferguson specification

### Long-term
1. Performance optimization
2. Complete SrQ implementation
3. Comprehensive Ferguson compliance validation

## Success Metrics
- **Target**: 95% pass rate (562/591 tests)
- **Current**: 93.4% (537/591 tests)
- **Gap**: 25 more tests to fix