@8599d6ab I've always thought of biological systems as "messy" rather than complex. Messy in the sense that there are so many things going on and we don't have a handle on them, how they behave and how they interact. But I'm a physicist. 

 @422f8550 

We're sooooo on the same page, albeit at different levels. As a brain researcher, I think about psychology (and especially psychpathology) the same way - messy!