How to Find Out If You a Brain in a Vat
- The brain-in-a-vat -concept points to the question, how do you know that you are not really living in a awfully sophisticated virtual reality? You have no direct access to the universe itself, you have to experience it through your sense and those can be fooled. This is an ancient old question debated in Philosophy in many forms since at least Descartes. Matrix has made this idea pop in recent years.