A rift can be subtle.Logical formLearned from4 sentences. A substitution can be subtle.Logical formLearned from4 sentences. An evaluation can be subtle.Logical formLearned from4 sentences. A side-effect can be subtle.Logical formLearned from4 sentences. A (surface detail) can be subtle.Logical formLearned from4 sentences. Highs can be subtle.Logical formLearned from4 sentences. A concept can be subtle.Logical formLearned from4 sentences. Graduations can be subtle.Logical formLearned from4 sentences. A (running gag) can be subtle.Logical formLearned from4 sentences. A foreplay can be subtle.Logical formLearned from4 sentences. A bounce can be subtle.Logical formLearned from4 sentences. Thoughts can be subtle.Logical formLearned from4 sentences. Topics can be subtle.Logical formLearned from4 sentences. A surface can be subtle.Logical formLearned from4 sentences. Motion can be subtle.Logical formLearned from4 sentences.