Well... it's more like by asking an extremely dumb question helps other people in the room know when they're being bullshitted.

"So, I see your business model is to make widgets. But ... uh... I don't really understand these ideas but that's called capital intensive, right? So, you're gonna have a factory, with a bunch of workers... in San Francisco? Won't that be really expensive, and ... uh, I guess that means your profit margin will be small? Could you put your factory in Kansas?"

(paraphrased but essentially accurate question I asked when being pitched by a hardware startup at a major VC that I advised)