BM, for one to understand, you unfortunately must use the concept.
Think like this, does the past exist? No. Because there is no physical or material evidence that it does or has done. Also time cannot be edited. So then why can we change the past. For example, if a man dies with no family or friends or acquaintances. He effectively ceases to exist so long as all evidence of his existence is destroyed. So did this man ever exist at all, for surely the 'past' defines old existence.
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Oh yeah, fair point. Maybe he was just tortured until he lost consciousness.
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