> It turns out that our knowledge of the behaviour of non-trivial domains (like zoology or banking) does not classify into a nice tree, it forms a directed acyc

> It turns out that our knowledge of the behaviour of non-trivial domains (like zoology or banking) does not classify into a nice tree, it forms a directed acyclic graph. Or if we are to stay in the metaphor, it’s a thicket. That completely chimes with my experience. I wondered if I was doing OOP wrong, as any time the size/complexity of a project (or module) gets above a certain level, a Thicket results in my code. > Classes are the wrong semantic model, and the wisdom of fifty years of experience with them is that there are better ways to compose programs. Where's your source/links? What? This needs expanding - if there are better ways, outline your evidence and show us where we're going wrong :)