Experimental Tests of the G2 Framework: Predictions, Instruments and Kill Conditions

We collect the falsifiable predictions of the G2 framework in one place, each paired with the experiment that would test it and the result that would refute it. The framework predicts a dark energy equation of state of exactly w = −1, tested by DESI and Euclid; a reactor mixing angle sin²θ₁₃ = 1/42, tested by JUNO and DUNE; a proton lifetime of order 10³⁶ years, within reach of Hyper-Kamiokande; an axion of mass 13–14 neV on the DFSZ line, covered by the proposed DMRadio-GUT; and a dark matter candidate near 12 GeV with a small cross-section consistent with current null results. For each we state the predicted value, the measuring instrument, the current status, and the kill condition — the observation that would falsify that part of the framework. We also list the framework's retrodictions, which reproduce known quantities and serve as consistency checks rather than tests. The purpose is to make the framework accountable: to state plainly what it forbids, so that it can be shown wrong if it is.