Question: what do the 3 dots mean in math
[{'answer': 'the therefore sign', 'provenance': [{'wikipedia_id': '10593264', 'title': 'Therefore sign', 'start_paragraph_id': 1, 'start_character': 44, 'end_paragraph_id': 1, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'therefore sign', 'provenance': [{'wikipedia_id': '10593264', 'title': 'Therefore sign', 'start_paragraph_id': 1, 'start_character': 48, 'end_paragraph_id': 1, 'end_character': 62, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'a logical consequence , such as the conclusion of a syllogism'}, {'answer': 'the therefore sign ( ∴ ) is generally used before a logical consequence , such as the conclusion of a syllogism'}, {'provenance': [{'wikipedia_id': '10593264', 'title': 'Therefore sign', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 375, 'bleu_score': 0.6816476074249921, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13591449469826568799}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '10593264', 'title': 'Therefore sign', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ['The symbol consists of three dots placed in an upright triangle and is read "therefore".', 'The symbol consists of three dots placed in an upright triangle and is read "therefore".', 'The symbol consists of three dots placed in an upright triangle and is read "therefore".', 'In logical argument and mathematical proof, the therefore sign () is generally used before a logical consequence, such as the conclusion of a syllogism. The symbol consists of three dots placed in an upright triangle and is read "therefore". It is encoded at .']}}]}]