That’s not how it works, I’m pretty sure… Mutations will have random effects and the species evolves based on characteristics being selected for based on better survivability, reproductive effectiveness, etc.

That's why I said that it's rare for evolution to screw up, not that it's impossible.

I’ve read your other messages and it seems that you’re thoroughly convinced that this wasn’t the case here.

I've made a lot of comments but few of them have been about the details of this specific case, I'm not sure which ones you're referring to.