A formal model can be abstract.Logical formLearned from6 sentences. Predictions can be abstract.Logical formLearned from6 sentences. A definition can be abstract.Logical formLearned from6 sentences. An information can be abstract.Logical formLearned from6 sentences. A word can be abstract.Logical formLearned from6 sentences. Varieties can be abstract.Logical formLearned from6 sentences. A turn can be abstract.Logical formLearned from6 sentences. A subclass may pertain-to an abstract class.Logical formLearned from6 sentences. A (computing machine) can be abstract.Logical formLearned from6 sentences. An abstract class may define a (lookup table object).Logical formLearned from6 sentences. An abstract class may encapsulate a (time zone).Logical formLearned from6 sentences. Abstract (data types) may undergo an implementation.Logical formLearned from6 sentences. Roots can be abstract.Logical formLearned from6 sentences. A skeleton can be abstract.Logical formLearned from6 sentences. A (factory design pattern) can be abstract.Logical formLearned from6 sentences.