theorem commitment_robust_to_drift {sigma_prev delta beta_old beta_new : ℝ}
(hs : 0 < sigma_prev) (hdelta : delta ≠ 0)
(hb1 : 0 < beta_old) (hb2 : 0 < beta_new) (h12 : beta_old < beta_new)
(_ρ : ℝ) :
0 < commitmentGain sigma_prev delta beta_old beta_new :=
commitmentGain_positive hs hdelta hb1 hb2 h12Time Inconsistency Resolution via Upstream Reform (Gap 11)