| ⊦ ints = [], is2bs(ints) .butlast = is2bs(ints .butlast) |
ints0 = [] ∨ is2bs(ints0) .butlast = is2bs(ints0 .butlast) ⊦ i + ints0 = [], is2bs(i + ints0) .butlast = is2bs((i + ints0) .butlast)
[[CONCRETESIMPRULES : ([CSIMPGEN : intlist generated by [], +;])]]