I've thunk and thunk and can't come up with a reason why it's second nature for me to go from double triggers to a single one, without any problems, and vice versa. I can also shoot the rear trigger first, then go to the front without any conscious thought. I began with double triggers at age 8, went to a single at 12, and didn't shoot double triggers for some 30 years or so.

Maybe the less intelligent one is, the easier it is to swap around without any thought. I would certainly qualify in that regard.