∀ {ι : Type u_1} {M : Type u_3} [inst : AddCommMonoid M] [inst_1 : Module ℚ≥0 M] {s : Finset ι} {f g : ι → M}
  {t : Finset ι}, s = t → (∀ i ∈ t, f i = g i) → (s.expect fun i => f i) = t.expect fun i => g i