General Discussion
In reply to the discussion: NAFTA passed on Nov. 20, 1993, on the promise of jobs. Oddly enough . . . [View all]Recursion
(56,582 posts)OP is examining the claim: "NAFTA caused an increase in unemployment in the US".
OP's counterargument is to demonstrate that NAFTA's passage was not correlated with an increase in unemployment in the US (it passed and unemployment went down, not up).
Since there was no correlation to begin with, OP has shown the claim of causation to be specious, ie, NAFTA cannot be said to have caused an increase in unemployment.
You're arguing that OP hasn't shown that NAFTA caused a decrease in unemployment, which is true, but that isn't the argument OP is making. OP is saying that the claim that "NAFTA destroyed our economy" is a causal argument, and causal arguments require correlation (correlation is a necessary but not sufficient indicator of causality), and the correlation required for that argument doesn't exist.