# Study 000F Audit

## Structural Audit

This package is structurally sound.

It includes:

- manuscript
- abstract
- methods
- results
- discussion
- limitations
- plain-language summary
- copied source tables
- generated outputs
- generated figures
- build script
- manifest

## Scientific Audit

### Question

Do the combined findings from `000D` and `000E` support the existence of a successful operating envelope rather than a simple place, surface, or treadmill-versus-outdoor distinction?

### Was the question answered?

Yes.

The strongest supported answer is:

`Yes. The combined archive supports a successful operating envelope as a better explanatory construct than surface category alone.`

### Is the answer stronger than the data allows?

No.

The package does not claim that every axis of the envelope is settled.
It claims only that:

- surface alone is insufficient
- operating envelope explains more of the archive
- the April 2026 exception sharpens rather than destroys the model

### Does the package avoid scope creep?

Yes.

It does not try to fully settle:

- cadence preservation mechanism
- ecological narrowing mechanism
- next-day burden mechanism
- hybrid-cardio support function

Those remain later studies.

## Audit Verdict

`Study 000F` is structurally sound and scientifically coherent as a flagship hypothesis study.

It should be treated as the study that tests whether `operating envelope` becomes a true program pillar.