I don't want to revise my objection, because it's not really a material implication that you're using. You're using probabilistic reasoning in your argument,i.e., pointing out certain pressures that exist, which rule out certain ways that people could be getting smarter, and therefor increases our probability that people are not getting smarter. But if people are in fact getting smarter, this reasoning is either too confident in the pressures, or is using far from bayesian updating.

Either way, I feel like we took up too much space already. If you would like to continue, I would love to do so in a private message.