 Several additional epistemological strategies were put under close scrutiny by Latin American epistemologists. Here are a few of them. Diana Hoyos (Colombia) (2006) works on contemporary theory of knowledge, linking the concepts of epistemic responsibility, Gettier examples and skepticism. Jorge Gregorio Posada (Colombia) (2007) has responded to her work. Ignacio Ávila (Colombia) (2003) confronts Davidson’s thesis that most of our beliefs are true with the corresponding skeptical challenge. Another popular anti-skeptical strategy is contextualism. Flávio Williges (Brazil) devoted his Ph.D. dissertation to that subject, from which resulted a paper (Williges 2013), and André Joffily Abath (Brazil) (2012) uses contextualism to refute Cartesian skepticism.