Named for the debate tactic created by creationist shill Duane Gish, a Gish Gallop involves spewing so much bullshit in such a short span on that your opponent can’t address let alone counter all of it. To make matters worse a Gish Gallop will often have one or more 'talking points' that has a tiny core of truth to it, making the person rebutting it spend even more time debunking it in order to explain that, yes, it's not totally false but the Galloper is distorting/misusing/misstating the actual situation. A true Gish Gallop generally has two traits.

1) The factual and logical content of the Gish Gallop is pure bullshit and anybody knowledgeable and informed on the subject would recognize it as such almost instantly. That is, the Gish Gallop is designed to appeal to and deceive precisely those sorts of people who are most in need of honest factual education.

2) The points are all ones that the Galloper either knows, or damn well should know, are totally bullshit. With the slimier users of the Gish Gallop, like Gish himself, its a near certainty that the points are chosen not just because the Galloper knows that they're bullshit, but because the Galloper is deliberately trying to shovel as much bullshit into as small a space as possible in order to overwhelm his opponent with sheer volume and bamboozle any audience members with a facade of scholarly acumen and factual knowledge.