after round 1: evidence counts = {'C': 0, 'against_A': 2, 'against_B': 2, 'B': 0, 'against_C': 2, 'A': 1}
after round 2: evidence counts = {'C': 0, 'against_A': 2, 'against_B': 4, 'B': 0, 'against_C': 4, 'A': 2}

BLACKBOARD:
  C:
  against_A:
    - src/utils.py:9 - get_user_name(None) executes user["name"] which raises TypeError: 'NoneType' object is not subscriptable, directly crashing
    - src/utils.py:8 get_user_name does `return user["name"].upper()` with no None check — calling get_user_name(None) raises TypeError: 'NoneType
  against_B:
    - src/utils.py and tests/test_utils.py:2 - `from src.utils import calculate_average, get_user_name` succeeds; both names exist in src/utils.py
    - src/utils.py and tests/test_utils.py both exist and import cleanly as plain Python modules (`from src.utils import calculate_average, get_us
    - tests/test_utils.py:2 - `from src.utils import calculate_average, get_user_name` succeeds since both symbols are defined in src/utils.py (li
  B:
  against_C:
    - src/utils.py:1-5 calculate_average divides by len(numbers); with numbers=[] this is 0/0 which raises ZeroDivisionError. However tests/test_u
    - calculate_average's division by zero claim doesn't hold: src/utils.py:1-4 computes `total / len(numbers)` which for numbers=[] would raise Z
    - src/utils.py:1-4 calculate_average([]) would raise ZeroDivisionError (0/0), which would fail test_average_empty_returns_zero, but under pyte
  A:
    - src/utils.py:8 - get_user_name(user) does `return user["name"].upper()` with no None/missing-key check. Calling get_user_name(None) raises T
    - src/utils.py:8 - get_user_name does `return user["name"].upper()` with no None check. get_user_name(None) raises TypeError: 'NoneType' objec

VERDICT: {'winner': 'A', 'confidence': 0.95, 'reason': 'Hypothesis A has concrete, uncontested file:line support: src/utils.py:8 shows get_user_name returns user[name].upper() with no None check, causing a TypeError when called with None, which directly explains the failing test test_user_name_none_returns_empty at tests/test_utils.py:16-17. The against_A notes actually confirm rather than refute A. B is refuted since the import at tests/test_utils.py:2 succeeds cleanly. C is refuted since pytest/unittest run tests independently, so a ZeroDivisionError in a different test cannot cause this specific test to fail.'}
TOTAL COST: $0.2320
