So, in other words: which of your core beliefs do you think has the highest likelihood of being wrong? And by wrong, I don’t necessarily mean the exact opposite - just that the truth is significantly different from what you currently believe it to be.
I don’t think it could be anything I expect. Most of the things I have consciously evaluated about myself I’ve come to a conclusion based on rational or empirical evidence, so I am certain either in my knowledge or ignorance about a topic. Most of the time when I’ve been proven wrong it’s about a belief I imbibed as a child and never questioned or considered until then.