Why is it VERSUS?

It's shorthand. Evolution these days broadly means 'change', and noone disputes things change.In the context of the forum it refers to biological evolution - as you have deduced.This position is contrasted with special creation which holds that while there is variety within a baramin the main forms of animals were specially created (usually in the recent past).That was the original focus of this forum - though we also discuss many other things including theistic evolution (the position that it mostly happens naturally, but an intervening godish being helps nature overcome some boundaries (to 'higher species' as some might say). Or Intelligent design which has largely become the same as theistic evolution these days, only they stress it wasn't a godish being but could be any generic 'intelligent agent' with sufficient power/resources etc.

This universe only appears rational. That is to say, within the scope of our evolved environment it is natural that the world would appear rational (something that 'makes sense') since our sense making tools were evolved to make sense of the low energy macro universe in which we are competing.But when you look closely - it transpires that the universe isn't reasonable, rational, sensical, or even particularly understandable. It is marginally describable.