One trick I've used is to look for non-technical errors. Often, people don't even argue the technical merits. For example, when discussing climate change, wai

One trick I've used is to look for non-technical errors. Often, people don't even argue the technical merits. For example, when discussing climate change, waiting for 100% certainty is a flag they are not serious. No one ever has 100% certainty. On top of which, you buy house insurance despite the probability of a fire being very small, you care about the risk (P*E). Moving the goal post, ad hominem attacks, etc...