if you aren't breaking the law, you are not driving too fast...
now there's a thing called driving too fast for conditions like fog/rain/snow/ice but that was never mentioned
now either the state speed limit is right or it's wrong... like you said, it's a simple concept, so which is it???
Here’s an idea: Driving the speed limit, rear end a slower moving vehicle. Then explain to the officer that you did nothing wrong.