[dtougas]

If you are giving your ball a collide method, or creating a CollisionPolicy, then you are probably doing it wrong. Therein lies a huge part of the problem of OO design: modelling is difficult, and lots of us get it wrong.

Just because you use FP or some other paradigm does not automatically mean you will get it right. I have seen poorly modelled solutions written in many different languages. I have also seen elegant solutions implemented in a variety of forms as well.

I think that having some depth of experience in a language, as well as a solid grasp of the problem, and perhaps some anal retentive tendencies (i.e. an innate desire to keep things very structured and consistent), can go a long way to solving problems elegantly :-)