"No, they really don't."
Yes, labs really can eliminate selection pressure. So can zoos. Yes, labs and zoos really exist.
On the other hand, there isn't anything left of your poor argument. Too bad.
"Selection pressures don't have to exist (e.g. in a zoo)."
Selection pressures do exist in a zoo.
"Mutations can happen without selection pressures (e.g. in a lab that is creating pigs to produce human growth hormone)."
Those mutations get selected for by the lab researcher. Selection can't be eliminated.
"Which is to say, my examples can't be logical fallacies. Fallacies don't happen. My examples do."
No, they really don't.
"No, they really don't."
Yes, labs really can eliminate selection pressure. So can zoos. Yes, labs and zoos really exist.
On the other hand, there isn't anything left of your poor argument. Too bad.