Do you remember the part of The Matrix where Morpheus tells Neo that humans are in fact trapped in a massive neural network that is directly linked into their collective consciousness? It is a way of controlling humans so that the Machines can live off the energy that our body heat produces.
That was one of the cooler scenes of the entire series and it leads me to ask you:
How do we know that life as we know it is not a virtual reality construction like the Matrix? How do we know we are free or are just allowed to think we are free?