Hm. I think that such a strategy might fare well in cases where you're trying to catch errors in your thinking itself, but I usually find myself simply lacking brainpower -- I probably make more errors as well, but the primary cost is that I don't work as fast, learn as fast etc. This sort of thing seems harder to eliminate.

I'm also thinking that the only similar hindrance that one might encounter if they were under (time?) pressure would be tiredness -- hunger/thirst/mild pain are solved in the short term by just adding a few things to your bag.