 In Colombia, one finds several scholars interested in Wittgenstein’s philosophy, among whom one should mention Magdalena Holguín (b. 1950) and Raúl Meléndez (b. 1964). Holguín obtained her B.A. and M.A. in philosophy from Georgetown University, her M.A. in law from the Universidad de los Andes (Colombia), and her Ph.D. in philosophy from Columbia University. She taught at the Universidad de los Andes and the Universidad Nacional de Colombia. In her short 1997 book, she explores Wittgenstein’s stance on certain skeptical problems. After presenting Wittgenstein’s view that philosophy is not a theory or a doctrine but an activity, as well as the changes in his conception of philosophy over the different phases of his thought, Holguín examines the distinction between appearance and reality, the distinction between subjective and objective, and the idea, shared by skeptics and dogmatists but rejected by Wittgenstein as being based on confusion, that knowledge requires an ultimate foundation. (It should be noted that skeptics of a Pyrrhonian stripe suspend judgment about whether knowledge requires an ultimate foundation.)