forum for week of 26 September: skepticism

When faced with someone who doubts the very nature of reality, most people find it very difficult to construct an argument as neither point can be proven. Thus it becomes an argument solely for the sake of argument which is not overly exciting concept. If we are actually just brains in vats and our reality is nothing more than a false perception, nothing in our day to day lives would change, other than a far greater rate of depression.