slippery slope fallacy - Google Search
The straw man fallacy also has its inverse—the “motte-and-bailey” fallacy6—which can be used as a defensive tactic.
Tim Urban • What's Our Problem?: A Self-Help Book for Societies

The majority of leftist arguments are just incoherent screaming.
The rest take one of two forms. https://t.co/Ta0FBCyBix
To determine whether an argument is valid, one method is to try your best to imagine or describe a situation in which the premises are true and the conclusion is false. If you can describe a situation with this combination of truth values, then the argument is not valid.