I have run into an online discussion about philosophies and world views (theism, atheism, humanism, nihilism, and all the other "isms") where phrases like "*ism is true" and "*ism is false" are used. What do they mean?
For example, let's say "blueism" is the philosophy that everything in life can and should be expressed in blues songs. I can understand the meaning of assertions like "blueism is silly", "blueists are annoying", etc.
But what do assertions like "blueism is true" and "blueism is false" mean? I (a non-philosopher) would have thought blueism to be "true" for those who accept it and "false" for those who don't.
I'm thinking that a phrase like "blueism is true" is perhaps some kind of philosophy lingo. Is it shorthand for "the philosophy of blueism is based on assumptions that have been proven true"? Or what?