[BoiledCabbage]

> Also it does not make logical sense to me why such a feature should even develop, why have consciousness if you can have intelligence and problem solving without it?

Who/what says that you can? Consciousness seems to make most sense as a sliding scale than as a sudden switch.

But even if you do argue that it's optional with intelligence, the reason it would be present would simply be: is the most efficient way to implement it.