And why would they need you to tell them it was safe to pass that "typical old farmer going to town at 40 mph on a 65 mph hiway" unless they couldn't see past you? Basically you're telling them it's all clear and no traffic coming so they can go around both you and the old farmer. Where does the brain usage come into effect? They either believe you or they don't. I used to, now I don't.
Good grief..... where is your reading comprehension. Your blathering(s) just answered your brain usage question.
If you were a experienced hauler you would know of many reasons it takes a brain to know how to safely pass another vehicle when some one your following gives you a signal.
