I don't really understand what this concept is adding that ideas like "blinkeredness" don't already cover, as orthodox in this case (as has been pointed out by

I don't really understand what this concept is adding that ideas like "blinkeredness" don't already cover, as orthodox in this case (as has been pointed out by others here) is context-dependent. I've read it a couple of times and am still a bit unsure of what new idea it's getting at.