John Greco's 'External World Skepticism'

Analysis of “External World Skepticism” by John Greco
Introduction:
In the article “External World Skepticism” by John Greco, he mentions a skeptical argument. John Greco doesn’t accept the concept of contextualism, but rather he accepts the sensitivity theory instead. In this paper, I shall argue that the term of contextualsim regarding Descartes example is in fact true. Descartes has a clear example that it does support the conclusion in the skeptical argument. In this paper I will summarize the ideas that Descartes has on solving this quarrel and also the evil demon example. In which supports the argument and the idea of contextualism, rather than sensitivity.

Summary:
In the paper, John Greco accepts the concept of the sensitivity theory. The sensitivity theory is about the intuitive sense in which it requires not only being correct, but also tracking the truth in other possible circumstances. The sensitivity theory refers that S’s belief that P is sensitive and only if P were false, S wouldn’t believe P. The sensitivity theory responds to the skeptical argument. The skeptical argument states that “1.
The whole idea of contextualism is that S knows P, S doesn’t know P depends on the context that has been or is being uttered. Contextualism limits the skeptical damage by adding a further claim, making the argument unsound and the conclusion to be false, relative to the context of our ordinary knowledge that is being expressed. Greco mentions that Descartes explanation of the evil demon doesn’t quite explain the skeptical argument 2, in which is says that I don’t know ~h. But I think it does, because Descartes is actually giving an explanation about it with his evil demon example. Where it says that an evil demon deceived him into believing that there were physical things. By this he means that the context refers, not to certain features of the subject of knowledge or the object