What If: Prologue

What if it's possible that our brains have been lying to us? And they make us see objects that arent really there? What if our whole life and existence was just a lie caused by the lack of use of our brains causing them to make delusions that we mistake as real? Because we've never questioned what was real or not real, we could all be living one huge delusion that everyone sees pretty much the same thing that was never real this whole time.