Denialism consists of movements that feel triumph because they continue to maintain an absurd contention and nobody can make them stop.

It is threatened with replacement by post-denialism, in which a group of people spew all sorts of contradictory bullshit and revel in the fact that they have the power to undermine systematic efforts to determine the truth.

We need to recognize bullshitting groups and stop giving credence to the bullshit, but that alone won't stop them from killing people and occasionally paralyzing society.