It's humbling and it's happened to me, so I would not be surprised if it has happened to you. To be so sure, so certain, so already decided about something -- completely convinced -- only to discover that there was a flaw in the logic, there were facts not in evidence, there were perspectives unseen. There have been times when realizing that I was wrong about something rocked me more than the original problem. To find out that it couldn't be solved in the way that I was sure would work was shocking.
What I learned was, do not be that certain. Yes, there are times when you know that you are right and you ARE - but they feel just like the times when you know that you are right and you are not. It's like coming out of a dream that goes in a direction that did not even seem possible.
Our brains are human. Our minds are fallible. It's hard to evaluate the instrument at work with the instrument at work. It's so convincing in it's built-in bias. We need to step back, get a fuller perspective, talk to someone else, and breathe. Let go of the outcome just long enough to see what the possibilities still are.
Find the flaw in your thinking while you can still find it, or the problem is yours to keep.
-- doug smith