Some concepts may remain abstract.Logical formLearned from2 sentences. (Math concepts) can be abstract.Logical formLearned from2 sentences. A balancing can be abstract.Logical formLearned from2 sentences. Abstracts may be listed by abstract number.Logical formLearned from2 sentences. Aspects can be abstract.Logical formLearned from2 sentences. A key word can be abstract.Logical formLearned from2 sentences. An indexing can be abstract.Logical formLearned from2 sentences. Listings can be abstract.Logical formLearned from2 sentences. A citizenship can be abstract.Logical formLearned from2 sentences. Variety can be constituted-of-or-filled-with abstract concepts.Logical formLearned from2 sentences. Abstract concepts may be handled as an afterthought.Logical formLearned from2 sentences. A recreation can be abstract.Logical formLearned from2 sentences. A (software architecture) can be abstract.Logical formLearned from2 sentences. Familiarity can be with abstract (data types).Logical formLearned from2 sentences. A (painting tradition) can be abstract.Logical formLearned from2 sentences.