A day may go sour.Logical formLearned from4 sentences. An acid can be sour.Logical formLearned from4 sentences. A tang may pertain-to a sour cream.Logical formLearned from4 sentences. Some whiskey can be sour.Logical formLearned from4 sentences. A demeanor can be sour.Logical formLearned from4 sentences. A sour cream can be on top.Logical formLearned from4 sentences. A friendship may go sour.Logical formLearned from4 sentences. A coating can be sour.Logical formLearned from4 sentences. A guard can be sour.Logical formLearned from4 sentences. (Punch straws) can be sour.Logical formLearned from4 sentences. A professor can be sour.Logical formLearned from4 sentences. Belts can be sour.Logical formLearned from4 sentences. A heart can be sour.Logical formLearned from4 sentences. A (housing market) may be gone sour.Logical formLearned from4 sentences. Grapes can be sour.Logical formLearned from4 sentences.