 The first important reaction came from philosophers concerned with scientific knowledge. Hilan Bensusan and Paulo Souza (1994) thought that Pyrrhonism was an outdated philosophy. In the face of contemporary science, Pyrrhonism would no longer be a viable alternative, for it had not the adequate concepts to explain that science. Therefore, the fact that science has evolved in unforeseeable ways is an objection to neo-Pyrrhonism. Luiz Henrique de Araújo Dutra (1993, 1995, 1996, 1997b), also criticizing Porchat’s conception of science, came to propose another skeptical position, which he called “alethic skepticism”. Dutra thought that the metaphysical notion of truth is indispensable to scientific research. Both held that modern science establishes theories that cannot be doubted by the neo-Pyrrhonist. Otávio Bueno has a more sympathetic proposal toward skepticism and develops a neo-Pyrrhonist approach to contemporary science by combining it with van Fraassen’s view (Bueno 2015). Neo-Pyrrhonian empiricism emphasizes the notion of empirical adequacy.