An igneous rock can be hard.Logical formLearned from17 sentences. Limits can be hard.Logical formLearned from17 sentences. Files may be stored on a hard drive.Logical formLearned from17 sentences. Credit can be for a hard work.Logical formLearned from17 sentences. Photos can be on a hard drive.Logical formLearned from17 sentences. A hard work may undergo a celebration.Logical formLearned from17 sentences. Buttons can be hard.Logical formLearned from17 sentences. A success can be hard.Logical formLearned from17 sentences. Blue eyes can be hard.Logical formLearned from17 sentences. A male may play on hard courts.Logical formLearned from17 sentences. Some journalists may be sentenced to hard labor.Logical formLearned from17 sentences. A person may breathe hard.Logical formLearned from17 sentences. An (exit date) can be hard.Logical formLearned from17 sentences. An (indoor tournament) may be played on hard courts.Logical formLearned from17 sentences. A male may have a hard head.Logical formLearned from17 sentences.