Task: Text Categorization
Input (English): This writer distinguished between learning through description and learning through acquaintance in a work that introduces the Cartesian method of doubt with the example of a table. This man attempted to solve the problem of negative existentials in a work that claimed that "Aristotle" was not a name but a description. That work by this man also criticized Meinong and rejects the distinction between propositions and truth values proposed in (*) Frege's On Sense and Reference. This author of The Problems of Philosophy and "On Denoting" introduced his namesake paradox in naive set theory in a work that attempted to explain mathematics with axiomatic logic. For 10 points, name this British philosopher who co-wrote Principia Mathematica with Alfred North Whitehead.
Output (English): Social Science