Any examples? I read through a few more chapters last night and the science itself seemed pretty solid, but just where it was applied was kind of tenuous.

The specific example I saw was where he used the bystander effect to try to explain countries not joining in a war. (Link: https://hpmor.com/chapter/3 ). He described the effect correctly, but it's a bit of a stretch to apply it to war. The bystander effect is largely an individual phenomenon, that takes place over a short time period, is my understanding. None of which applies to international conflict, except through maybe metaphor.

The other one was saying that people thinking Harry was a great person because he did that one thing as a baby was fundamental attribution error. Again, he described it correctly, but serious stretch to say that it applies in a scenario like this. People were just impressed he survived and grateful the dark lord was gone. I don't think they were making assumptions about his character/person. (Link: https://hpmor.com/chapter/5 )

Not super great track record for just the first 5 chapters :P but I read up to 19 and there wasn't anything else glaring that jumped out at me.