Asklemmy

That's the thing: You can't unless you are already well-informed beforehand.

Yes, it is possible to spot common rhetorical deceptions such as whataboutisms or straw man arguments, but misinformation in general is impossible to debunk in real time unless it defies common sense such as "Immigrants are eating the pets of locals".

A popular talking point here in Germany when the government was trying to push for installing heat pumps instead of gas or oil based heating solutions was, that installing a heat pump would entail massive renovation costs to make its use viable. This information is semi true because installing a pump in older buildings might indeed require renovations. But exposing this argument as a broad overgeneralization takes so much time and effort that it is impossible to do on the spot, unless you have prepared multiple examples of home configurations and the associated costs of installing a heat pump.

The whole idea behind Steve Bannon's famous tactic of "flooding the zone" is to flood the discussion with so much misinformation it would take a disproportionately amount of time to debunk it all.

TBH I don't bother with watching discussions anymore because of this.