A remark can be subtle.Logical formLearned from9 sentences. A contribution can be subtle.Logical formLearned from9 sentences. Gifts can be subtle.Logical formLearned from9 sentences. Methods can be subtle.Logical formLearned from9 sentences. Lessons can be subtle.Logical formLearned from9 sentences. Plays can be subtle.Logical formLearned from9 sentences. A logic can be subtle.Logical formLearned from9 sentences. Discrimination can be subtle.Logical formLearned from9 sentences. A chip can be subtle.Logical formLearned from9 sentences. A conspiracy can be subtle.Logical formLearned from9 sentences. Poison can be subtle.Logical formLearned from9 sentences. A subterfuge can be subtle.Logical formLearned from9 sentences. A tie can be subtle.Logical formLearned from8 sentences. (Styling changes) can be subtle.Logical formLearned from8 sentences. A book can be subtle.Logical formLearned from8 sentences.