An explanation can be unofficial.Logical formLearned from14 sentences. An explanation can be hard.Logical formLearned from14 sentences. A principle can be constituted-of-or-filled-with explanation.Logical formLearned from14 sentences. An explanation can be for an error.Logical formLearned from14 sentences. An explanation may pertain-to a shift.Logical formLearned from14 sentences. Explanations can be true.Logical formLearned from14 sentences. A source can be constituted-of-or-filled-with explanation.Logical formLearned from14 sentences. An explanation may show that something-is-the-case.Logical formLearned from14 sentences. Concepts may produce (material explanations).Logical formLearned from14 sentences. An explanation can be held.Logical formLearned from14 sentences. An explanation can be for a mystery.Logical formLearned from14 sentences. Explanations can be brief.Logical formLearned from14 sentences. A (selection board) may provide an explanation.Logical formLearned from14 sentences. A model may show explanation.Logical formLearned from14 sentences. An explanation can be institutional.Logical formLearned from14 sentences.