It's essentially impossible. Confidence is often a situational measure. "Is the sky blue?" * Generally, yes. If you ask a 5 year old, the answer is yes. * Is

It's essentially impossible. Confidence is often a situational measure. "Is the sky blue?" * Generally, yes. If you ask a 5 year old, the answer is yes. * Is the sky blue right now? Maybe, maybe not. You need to look outside. Even then, you might have wild fire haze. Is it still blue? Is it orange? When does blue become orange? * Is the sky blue in Blade Runner? Doesn't really seem like it. ----- Further, who are you talking to? Is this trivia night where your best guess is better than no guess? Is this a scientific panel? Do you have alternative options? Do those alternative options align with your opinion? If you're wrong, how wrong are you?