He introduced the concept of "familial relations" in a work that derided philosophy as a series of language games, and he attempted to set out a logically perfect language in another work that begins "The world is everything that is the case" and ends by claiming that what we cannot speak of, we must pass over in silence.
This man argued in a thought experiment that private objects are "irrelevant," an idea reinterpreted upon in Saul Kripke's work about this man "On Rules and Private Language."  He introduced the concept of "familial relations" in a work that derided philosophy as a series of language games, and he attempted to set out a logically perfect language in another work that begins "The world is everything that is the case" and ends by claiming that what we cannot speak of, we must pass over in silence. For 10 points, name this Austrian philosopher, author of The Blue and Brown Books, Philosophical Investigations and Tractatus Logico-Philosophicus.
This man argued in a thought experiment that private objects are "irrelevant," an idea reinterpreted upon in Saul Kripke's work about this man "On Rules and Private Language."  
Ludwig {Wittgenstein}