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 5: CORRECT - Kevin Patel <-> Lisa Zhang = False
Case 6: CORRECT - Olivia Martinez <-> Robert Kim = True
Case 7: CORRECT - Daniel Brown <-> Sophia Lee = False
Case 9: CORRECT - Andrew Thompson <-> Maria Santos = False
Case 10: CORRECT - Jessica Williams <-> Brian O'Connor = True
Case 11: CORRECT - Nathan Clark <-> Michelle Davis = False
Case 16: CORRECT - Diana Rodriguez <-> William Chang = True
Case 17: CORRECT - Eric Foster <-> Nicole Baker = False

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

Errors:
  - Case 3: WRONG - Expected False, got True (James Liu <-> Amanda Stevens)
  - Case 4: WRONG - Expected True, got False (Emily Richardson <-> Tom Bradley)
  - Case 8: WRONG - Expected True, got False (Chris Anderson <-> Patricia Nguyen)
  - 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)
  - Case 18: WRONG - Expected True, got False (Alexandra Green <-> Jason Kim)
  - Case 19: WRONG - Expected False, got True (Mark Peterson <-> Katherine Liu)

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