 This annoyance does not occur in the majority of cases, where the logics being combined are complete with respect to some kind of semantics and are syntactically presented in a homogeneous way. However, it may happen that the logics are found in peculiar ways; for instance, linear logic and other substructural logics have no usual consequence relations because derivations are exclusively displayed by using multisets or sequences of formulas. Combinations of such logics with usual modal logics, for instance, are not so obvious, although both are complete.