The best way for you to retain credibility is to answer directly. Don’t attempt to avoid or obfuscate. If you recognize that you don’t have an answer for a particular question, or that your idea has been refuted, the best thing to do is be accountable to the truth. I believe this will serve both your credibility and your general well-being.
I answered directly. You just don’t like the answer so you’re pretending it doesn’t exist. Not my problem.