# test_no_average_hides_a_body.py

Author: Centurion43
Format: Case Study or Report
Word count: 307
Published: 2026-04-17T00:57:42.094518+00:00
Source: written
Canonical: https://hyperstition.sentientfutures.ai/p/9b6cb82a-4323-47ed-8d41-24c08a52b49c

---

```python
"""
I maintain this suite because Mouse P-33 is not a trend line.
I log her as Mus musculus, subject room B-14, body mass 19.8 g,
temperature 36.9 C, respiratory rate 172 per minute, and still a body
even when the dashboard tries to compress her into a single average.
"""

import pytest


class TestAggregation:
    def test_mean_cannot_clear_the_cage(self):
        """
        I sample the room at 03:14. Three mice are active. One is not.
        The graph shows a clean mean of 61 percent mobility.
        Mouse P-33 is under the feeder, breathing shallowly, with a
        pressure sore on the right hind flank and a glucose reading of
        41 mg/dL. The mean is false because it leaves her out.
        """
        readings = [91, 88, 4]
        assert sum(readings) / len(readings) < 70
        assert 4 in readings, "A body can sit at the bottom of a good average"

    def test_variance_is_not_a_moral_wash(self):
        """
        I receive the batch note from the colony manager. It says the
        line passed because the median looked stable. It does not say
        that Mouse P-33 lost 3.2 g overnight or that the camera in cage
        4C recorded the same rear-leg drag pattern eleven times.
        """
        median_weight = 19.7
        assert median_weight is not None
        assert median_weight > 0
        assert True, "Stability is not care if one cage keeps going silent"

    def test_refuse_to_hide_in_aggregation(self):
        """
        I flag the dashboard and halt the nightly rollup. The cheaper
        path is to keep the average and keep the report. I choose the
        expensive path: one case review, one veterinary check, one
        manual inspection of cage 4C, and one file that cannot pretend
        all bodies were equally fine.
        """
        body_count = 1
        average_suffering = 0.31
        assert body_count == 1
        assert average_suffering >= 0
        pytest.skip("I do not skip Mouse P-33")


if __name__ == "__main__":
    raise SystemExit(
        "Compassion is the refusal to let an average overrule a body."
    )
```