What is wrong with this premise?

[wiploc]

All quantum physicist can say is that some things come into existence without local causes.

Right, you tell those quantum physicists what to believe.

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I think it's fair to propose that 'cause comes before effect' is no longer a priori knowledge.

I disagree. I think it's a matter of definition. You can claim that bullet holes cause guns to fire, but that would require adopting a new and different a priori definition.