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Content-Externalism is the view according to which, content of mental states are determined by relation that the person has with his environment and content of mental states does not depend on intrinsic properties of subjects. According to this view, if two persons with exactly same intrinsic properties were in different environments, contents of their mental states would be different. On the other hand, the doctrine of privileged access to mental states asserts that if cognitive faculty is functioning properly, then subject can know the content of his mental states a priori. Many critics of externalism believes that accepting externalism along with privileged access terminate to... 

As Davidson says, "Rorty sees the history of Western philosophy as a confused and victorless battle between unintelligible skepticism and lame attempts to answer it." Therefore we can say that the core issue of Epistemology, in various ages of history of philosophy, is the problem of skepticism. Semantic externalism according to some contemporary philosophers, like Hilary Putnam, Anthony Brueckner and Donald Davidson, gives various answers to skeptical arguments. On the other hand, skepticism also can be a challenge for semantic externalism. In this thesis, I have attempted to draw a scheme to clarify the status of these issues with regard to each other