Questions can be useless.Logical formLearned from72 sentences. A system can be useless.Logical formLearned from72 sentences. Programs can be useless.Logical formLearned from72 sentences. Thoughts can be useless.Logical formLearned from71 sentences. Features can be useless.Logical formLearned from69 sentences. A program can be useless.Logical formLearned from68 sentences. A player can be useless.Logical formLearned from67 sentences. Men can be useless.Logical formLearned from66 sentences. A paper can be useless.Logical formLearned from66 sentences. Words can be useless.Logical formLearned from65 sentences. A female may feel useless.Logical formLearned from65 sentences. Trinkets can be useless.Logical formLearned from65 sentences. A fact can be useless.Logical formLearned from65 sentences. An orbit can be useless.Logical formLearned from63 sentences. Software can be useless.Logical formLearned from63 sentences.