Brandolini's law, also known as the bullshit asymmetry principle, is an internet adage coined in 2013 by Alberto Brandolini, an Italian programmer, that emphasizes the effort of debunking misinformation, in comparison to the relative ease of creating it in the first place. The law states:
The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it.[1][2]
The rise of easy popularization of ideas through the internet has greatly increased the relevant examples, but the asymmetry principle itself has long been recognized.[3]
This was not a debate. It was Trump using a technique that actually has a formal name, the Gish gallop, although I suspect he comes by it naturally. It's a rhetorical technique in which someone throws out a fast string of lies, non-sequiturs, and specious arguments, so many that it is impossible to fact-check or rebut them in the amount of time it took to say them.