"If you do what you're told, you'll get rewarded."
Low IQ: "But I don't wanna", and then maybe steals the reward.
Very high IQ: "That is clearly a lie because of this data and this evidence and following those orders would clearly be detrimental for myself and the world. Fuck your stupid monkey treats."
Average ~ slightly above average IQ: "Yes sir! Would you prefer to stick your dick in my ass or down my throat?"