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.
The way I landed on all my current beliefs was taking in information from as many places as I could and I decided on what I think is right.
There are a ton of topics that can’t have an objectively correct answer which makes things fairly complicated.