A8: So in the US, how does logic determine that we should drive on the right side of the road, instead of on the left side of the road?
Spunkets: It's a convention to facilitate the orderly flo of traffic.
Notice, however, that logic or reason does not dictate left or right. The Brits use the left. We use the right. Notice also that there is nothing in "reality" that determines left or right. Only *authority* can establish the *truth* of the *normativity* of right or left. My example refutes your claim that authority never makes a truth to be true, but only deterimes (correctly or incorrectly) some already existing truth. That is patently false, given my example of the normativity of driving on the right or left side of the road.
-A8
No it doesn't. The authority simply made an arbitrary decision amongst two equally valid decisions. Neither decision involved a judgment of true/false whatsoever. It was impossible for the decision to be false and the corollary applies. The question involved the arbitrary choice of left/right. Completely arbitrary choices are irrelevant.