Your liberal examples are disingenuous. I would frame a couple like this:
1. If AGW is occurring we should legislate CO2 use
2. We should legislate CO2 use
3. AGW is occurring
Or this one is classic modern day liberal (left) ism
1. Republicans don’t want a black president
2. Republicans vote for Herman Cain
3. Herman Cain isn’t truly black
Not sure what the Latin term is, but we see these every day.