The theory (Eq. 16 or Eq. 22) has several interesting predictions that can be checked experimentally. (a) The magnitude of the VSC effect on rate constant scales (Eq. 18) as Ω 2 R or N , which should be experimentally verified with more data points that can reliably produce the scaling. (b) For two chemically similar reactions, if one operates under the mechanism in Eq. 7 and satisfies k 1 ≪ k 2 , k 3 but the other does not (due to the low reaction barrier), then the current theory predicts that there will be a VSC effect for the first reaction but not for the second one. (c) Based on k 2D VSC (Eq. 22), the action spectrum should have a longer tail at the red frequency (ω c < ω Q ).