https://m.youtube.com/watch?v=hzvesGB_TI0http://www.3ammagazine.com/3am/why-the-world-does-not-exist-but-unicorns-do/The kind of things a metaphysician has to argue against grows in number, day by day. . .
Well, George Berkeley already argued that the external world does not exist. Kant also makes the noumena/phenomena distinction.
Sure, all of that is well known. How is *this* a part of realism?