All is Idea? Or Keep it Real?

We talk a lot about ways of knowing and how they contribute to our knowledge. We evaluate knowledge claims.  Today, we’re going to do both.  Read the article below elucidating Berkeley and Wittgenstein’s concepts vs. materialism (keepin’ it real).  Then, we’ll evaluate the claims contained within. 

http://opinionator.blogs.nytimes.com/2015/04/13/philosophy-returns-to-the-real-world/