| ⊦ flatten(val ++ break(stringvar .label)) = flatten(val) ++ break(stringvar .label) |
is_valuelist(val) ⊦ flatten(val ++ break(stringvar .label)) = flatten(val) ++ break(stringvar .label)
⊦ is_valuelist(val), flatten(val ++ break(stringvar .label)) = flatten(val) ++ break(stringvar .label)
[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (is_valuelist(val))]]