| true, ∀ bits0. # bits0 < # bits → true → bits0 +1 = true ' + bitsinvert(bits0) ∨ false ∈ bits0 ⊦ bits +1 = true ' + bitsinvert(bits) ∨ false ∈ bits |
∀ bits0. # bits0 < # bits → true → bits0 +1 = true ' + bitsinvert(bits0) ∨ false ∈ bits0 ⊦ bits +1 = true ' + bitsinvert(bits), false ∈ bits