Does it exist? It’s hard to say:
It’s possible that with a lot of work, some extreme corner of the behavior spectrum could be isolated via specific criteria, which then merits labeling as ‘denialist’. But in truth the characteristics of our ‘proto-denialists’ above are radically different to expectations from the current framing, a framing which may have tainted the term beyond redemption. Nor is this approach a great plan even without that taint, because it tends to mask uncomfortable yet crucial truths, especially those in f) and g). So along with other errors we may end up fooling ourselves that there’s a nice clinical division between skeptics and ‘denialists’. Via naïve assumption of cause from a basic categorization of rhetoric, this is exactly the trap I believe Diethelm and McKee have fallen into. Hoofnagle goes further, dishing out labels of ‘dishonest’ and ‘crank’ yet without proper theoretical grounds; despite his noble motives many of these are bound to stick onto the wrong people. Some dishonesty and crankiness will ride any cultural wave, or backlash to such a wave, or backlash to an evidential cause that is perceived as cultural encroachment. But this does not mean that cranks and liars drive the main action; they do not. Nor can the touted methods reliably distinguish crankiness from cultural influence, or skepticism from either.
I would note (as always) that “denial,” and “denialism,” and “denialist” are not scientific terms. They’re religious ones.
[Update a while later]
Bill Nye epitomizes the Left’s authority complex.