The model may change. The past may not.

Methodology changes are permitted, but they must be explainable.

A proposed amendment should identify the Scriptural basis for the change, what explanatory problem it solves, what evidence supports it, what alternative interpretations were considered, and what prior model it supersedes.

Changes are also subjected to a retroactive-advantage test.

The question is:

Would we have made this methodological change if the later event had not already occurred?

If a change improves the apparent fit of a past event but lacks an independent Scriptural or methodological basis, it should not be allowed to rewrite the model retroactively.

Where appropriate, an amendment may improve future analysis while remaining ineligible to strengthen earlier predictions.

The purpose is not to prevent learning.

It is to prevent learning from becoming hindsight.