Caries may undergo a progression.Logical formLearned from6 sentences. Communication may undergo a progression.Logical formLearned from6 sentences. Moods may undergo a progression.Logical formLearned from6 sentences. (Work activities) may undergo a progression.Logical formLearned from6 sentences. Snow may undergo a progression.Logical formLearned from6 sentences. A progression may undergo a start.Logical formLearned from6 sentences. (Drug abuse) may undergo a progression.Logical formLearned from6 sentences. (Information technology) may undergo a progression.Logical formLearned from6 sentences. Differentiation may undergo a progression.Logical formLearned from6 sentences. A progression can be perpetual.Logical formLearned from6 sentences. (Substance abuse) may undergo a progression.Logical formLearned from6 sentences. Classes may undergo a progression.Logical formLearned from6 sentences. A basis can be for progression of a specification.Logical formLearned from6 sentences. A syndrome may undergo a progression.Logical formLearned from6 sentences. Effects may undergo a progression.Logical formLearned from6 sentences.