[DeadZone]

We've already discovered organisms that live and breed in acid pools (something like that anyway)

So the theory that all life must be Earth life (ie. oxygen & water) has already been proved false
Oh and too the fact that planet life consumed Carbon Dioxide, means that a Carbon Dioxide planet could easily support some form of life

There is no doubt in my mind that life can exist out there, its just a case of whether sentient life has yet to develop out there that I wont make up my mind until its proven either way