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it was about music and similar matters which the quran doesn’t have an explicit comment, but we do have direct evidence from hadhith and commentary of the Salaf regarding certain verses also agreement of vast majority of scholars. This brother questions the reliability of sources other than Quran and calls to use logic and reasoning in order to know whether sometime is good or bad. and according to him this is a commandment of Allah. We don’t need to argue with him but he is generating some following that we are worried about. So just need some evidence from quran and hadhit that forbid following one’s own logic in such matters.