Earlier quoted context omitted.
If your brain has a blind spot, stop writing English and write code, with test cases that hit all corner cases.
By the very definition, if your brain has a blind spot it'll not think of all the corner cases to test. That's why we do code reviews.
Before you write the code, your ideas may be so poor that they don't even hit the happy cases when you try to code them. You go "Oh, what was I thinking; it's obvious now that it could never work that way ..."
Of course, it's coding we are talking about; there will be bugs. Fewer than in some wishful prose, though.