Upper Saddle River, NJ: Prentice Hall.

Steup, Matthias, & Ernest Sosa, eds. (2005).

Contemporary Debates in Epistemology.

Malden, MA: Blackwell.

Unger, P. (1975).

Ignorance: A Case for Scepticism.

Oxford: Clarendon

الفصل الرابع: علم الوجود و«المصفوفة»

Berkeley, George (1993).

ed. Michael R. Ayers. London: Dent.

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