Why do my hardest, failing cases still stump me?
You can already handle most of what comes across your desk. That took real work, and you should not dismiss it. But now a few fields keep failing, and you're using the same tools that worked everywhere else. That's why they keep failing. A field that resists your normal method isn't a bigger version of an easy one. It's a different problem wearing the same clothes. Treat it as ordinary and you'll keep getting an ordinary result — which is to say, no result. Look at what makes the odd cases odd. Not what they share with the ones you've already solved, but what makes them refuse to behave. That difference is where your attention belongs, not on doing more of what already works elsewhere.
You already know how to run the routine cases. The failing fields stump you because you keep applying that same routine to problems it wasn't built for. Stop generalizing. Look at each failing case alone, name what's actually different about it, test one change, and watch what happens before you touch anything else.
What changes unlock by starting
- A written list of what actually separates hard cases from easy ones
- One tested change per failing field, instead of a pile of guesses
- Less time spent applying the wrong method to the wrong problem
- A growing record of odd conditions that makes the next one familiar