In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: This thinker argued that propositions were the true objects of thought in an early paper titled, "The Nature of Judgment", the ideas of which are taken largely from this philosopher's dissertation, "The Metaphysical Basis of Ethics". This thinker denied that one could conclude that all relations are internal from Leibniz's law in the paper "External and Internal Relations", while another famous paper by this philosopher asked whether esse was principi en route to arguing against A.E. Taylor's version of the titular philosophy. This philosopher offered his hands as the titular concept in his paper titled "Proof of an external world", and in his most famous work argued that it was impossible to define goodness in natural terms. The author of "The Refutation of Idealism", for 10 points, identify this thinker who critiqued the naturalistic fallacy in his magnum opus, Principia Ethica.
A:
Social Science