Test 2: Verifying classifications against expected values...
Case 0: CORRECT - Sarah Chen <-> Marcus Johnson = True
Case 1: CORRECT - David Park <-> Jennifer Walsh = False
Case 2: CORRECT - Rachel Torres <-> Michael Okonkwo = True
Case 3: CORRECT - James Liu <-> Amanda Stevens = False
Case 4: CORRECT - Emily Richardson <-> Tom Bradley = True
Case 5: CORRECT - Kevin Patel <-> Lisa Zhang = False
Case 6: CORRECT - Olivia Martinez <-> Robert Kim = True
Case 16: CORRECT - Diana Rodriguez <-> William Chang = True
Case 17: CORRECT - Eric Foster <-> Nicole Baker = False
Case 18: CORRECT - Alexandra Green <-> Jason Kim = True
Case 19: CORRECT - Mark Peterson <-> Katherine Liu = False

============================================================
Results: 11/20 correct (55.0%)
============================================================

Errors:
  - Case 7: WRONG - Expected False, got True (Daniel Brown <-> Sophia Lee)
  - Case 8: WRONG - Expected True, got False (Chris Anderson <-> Patricia Nguyen)
  - Case 9: WRONG - Expected False, got True (Andrew Thompson <-> Maria Santos)
  - Case 10: WRONG - Expected True, got False (Jessica Williams <-> Brian O'Connor)
  - Case 11: WRONG - Expected False, got True (Nathan Clark <-> Michelle Davis)
  - Case 12: WRONG - Expected True, got False (Laura Chen <-> Steven Wright)
  - Case 13: WRONG - Expected False, got True (Ryan Murphy <-> Angela Foster)
  - Case 14: WRONG - Expected True, got False (Hannah Miller <-> George Adams)
  - Case 15: WRONG - Expected False, got True (Tyler Robinson <-> Samantha Brooks)

FAILED: Only 55.0% accuracy (threshold: 80%)