A (memory loss) can be subtle.Logical formLearned from10 sentences. An advertisement can be subtle.Logical formLearned from10 sentences. Weaknesses can be subtle.Logical formLearned from10 sentences. An experiment can be subtle.Logical formLearned from10 sentences. A bond can be subtle.Logical formLearned from10 sentences. (Brush strokes) can be subtle.Logical formLearned from10 sentences. A strain can be subtle.Logical formLearned from10 sentences. Code can be subtle.Logical formLearned from10 sentences. An abuse can be subtle.Logical formLearned from10 sentences. A filmmaker can be subtle.Logical formLearned from10 sentences. Theories can be subtle.Logical formLearned from10 sentences. Speculations can be subtle.Logical formLearned from10 sentences. Tremors can be subtle.Logical formLearned from10 sentences. Racial prejudices can be subtle.Logical formLearned from10 sentences. Rituals can be subtle.Logical formLearned from10 sentences.