"you need them all to collude to stop together." Not really, and this isn't anything like a prisoners dilema. Coke doesn't need everyone to believe them, or ev

"you need them all to collude to stop together." Not really, and this isn't anything like a prisoners dilema. Coke doesn't need everyone to believe them, or everyone to collude. First and foremost they need their current customers to hear a believable story that HFCS is just fine. "Let the hippies drink that expensive stuff, we've got science on our side". Their customers already want to believe this for various reasons, so they will keep up this front.