Discovering an error seems like you’re finding out about it for the first time. Maybe you start a new hobby or a class at school and you run into an error there. You discovered it. That makes me like errors more cuz they’re not just gonna stay there, you can learn more about them. They aren’t set in stone.
I think saying “there’s a chance” means that you may not be successful. You may not be successful in what’s described in the quoted sentence. Maybe you won’t find an important thinking error. Maybe the thinking error isn’t all that important? Or it’s not even a thinking error?
For this part: “that investigating it will help us understand an important thinking error.” that talks about the chance. The error might end up helping you find an important thinking error. You can always investigate the error but there’s a chance you might find something important.
Investigating the error is what helps you understand an important thinking error. How do you understand an important thinking error? I think you learn about the important thinking error. How does the problems in our head fit here? Idk