How do I stop defending my idea once my team finds proof against it?

You say you value honesty. Then someone on your team finds a flaw in your plan. Your chest tightens before your mind opens. That gap — between what you claim and what your body does — is the real problem. This isn't a flaw in your character alone. It happens because you built the hypothesis, spent hours on it, and your name is on it. That investment pulls you to defend, not to test. Working with others makes this louder, not quieter. Now defending the idea also means defending your place in the room. You cannot think your way out of this by willpower alone, in the moment. You need a structure set before you're attached to any one answer. And you need people around you willing to hold you to it.