That book by this man dismisses the possibility of private language with its "beetle in a box" thought experiment.
Rush Rhees transcribed a lecture by this philosopher in which he claimed that a face drawn with four strokes could convey emotions with more exactitude than any adjective. Saul Kripke used an example involving the operation "quus"  (kwooce)  to illustrate a skeptical rule-following paradox this man supposedly posed. G. E. M. Anscombe edited a book by this man, which begins with a quotation on learning language by St. Augustine and argues that forms of life are verbalized in (*)  language games. That book by this man dismisses the possibility of private language with its "beetle in a box" thought experiment. This philosopher opened another book with "The world is all that is the case." For 10 points, name this author of  Philosophical Investigations  and  Tractatus Logico-Philosophicus .
Rush Rhees transcribed a lecture by this philosopher in which he claimed that a face drawn with four strokes could convey emotions with more exactitude than any adjective.
Ludwig (Josef Johann)  Wittgenstein  