I have a model of everything. Everything I am, my understanding of the world, it all fits together like a web. New ideas fit by their relationship to what I already know - maybe I'm missing nodes to fit it in and I can't accept it

If it fits the model well, I'll tentatively accept it without any evidence. If it conflicts with my model, I'll need enough proof to outweigh the parts it conflicts with. It has to be enough to displace the past evidence

In practice, this usually works pretty well. I handle new concepts well. But if you feed me something that fits... Well, I'll believe it until there's a contradiction

Like my neighbors (as a teen) told me their kid had a predisposition for autism, and the load on his immune system from too many vaccines as once caused him to be nonverbal. That made sense, that's a coherent interaction of processes I knew a bit about. My parents were there and didn't challenge it at the time

Then, someone scoffing and walking away at bringing it up made me look it up. It made sense, but the evidence didn't support it at all. So my mind was changed with seconds of research, because a story is less evidence than a study (it wasn't until years later that I learned the full story behind that)

On the other hand, today someone with decades more experience on a system was adamant I was wrong about an intermittent bug. I'm still convinced I'm right, but I have no evidence... We spent an hour doing experiments, I realized the experiments couldn't prove it one way or the other, I explained that and by the end he was convinced.

It's not the amount of evidence, it's the quality of it.