I could have constructed a more-detailed argument to support my premise that claims that the climate is changing are not primarily made by those who secretly believe that is untrue ("lies") or that the primary reason for making such claims is specifically in hopes of crippling the US economy.
However, I think it was simply a dumb statement and said so. Why? Because it beggars my belief that anyone could actually really-truly hold a belief that a vast conspiracy of scientists a) have a goal of hobbling the US economy (and, presumably, only the US economy) in the first place, b) believe that climate change claims represent an effective way of hobbling the US economy (as opposed to, say, building a giant evil death ray and aiming it at Wall Street), and c) do not believe that climate change is occurring yet publicly claim that it is.
Given that I don't believe that such a statement would have been made honestly by a rational person, arguing the point based on facts that have already been rejected using logical tools that appear unavailable to the maker of the statement strikes me as being about as useful as try to refute a statement such as "the claim that cats are mammals and that chocolate is toxic to them is a lie meant to hobble the Belgian chocolate industry" through a process of ratiocination.
I understand your point, and that is exactly the sort of thing I was thinking of when I wrote...
On the other hand, I have indeed encounter people saying things that are downright ridiculous, things that really are indeed obvious. Those are cases in which the amount of factual evidence at your disposal to refute the claim is so overwhelmingly enormous that you feel helpless to respond. You know that the person must have already encountered the evidence to the contrary before and chosen to ignore it. Such a person cannot be dissuaded, no matter what you say, so you might as well not waste your breath. In those arguments, the fallacy involved is often one of the various forms of the appeal to ignorance.