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  Dennis Hackethal addressed criticism #5447.

Brett says “Denying that good explanations of the physical world are hard to vary leaves us with *no better explanation* of what has driven progress in science, history and reason broadly.”

#5447​·​Dennis HackethalOP, about 5 hours ago

By saying HTV is central to progress, Brett contradicts his previous claim (#5355) that HTV is just a feature of explanations.