 Up to this point, several techniques for composing logics have been described and exemplified. Are these processes appropriate for composing, without surprises, any pair of logics? In other words, given a pair of logics (presented in a homogeneous way), are they composable in a meaningful way? Does the composition make philosophical sense? As pointed by Schurz 1991, it is conceivable that some multimodal logics obtained as combination of modal logics by adding arbitrarily chosen bridge principles could be meaningless.