[vkreso]

Everything is based on theories and assumptions. Everything is a model and all models are wrong.

The problem with psychology is that it is a much more disjointed science than others (and has been for a long time). You have islands of logic and some overlapping theories but all of them do not follow a unified framework. It is similar to how modern physics is trying to connect quantum theory and gravity.

I'd argue that the scale of such disjointedness correlates with the power of predictability of phenomena in a certain field. It is therefore true that we know nothing and at the same time something about mental health.

Connecting and integrating psychology through evolutionary psych, behavioral theories, cognitive sciences and such is an ongoing area of research and an example of an effort which reduces disjointedness of a field which may result in more succesful predictions and deeper knowledge about mental health.