What if there is no way to perceive reality? At best we can perceive our own reality, but other people's realities will probably differ. So that reality approach might simply fall short of realities. I mean it doesn't give us a way to solve problems, because individual realities might have too many discrepancies to be resolved by pure logic alone.
The only way it could work is with the omniscient super computer that understands all of our individual realities and always choses the optimum common dominator. Not sure if we want that, though.