Task: Text Categorization
Input (English): One of this scholars early works advocated that there were hidden proper nouns in certain Latin texts, a theory he abandoned after a poet refused to respond to his letters. In a work most famous in his own lifetime, this man advocated the idea that some forms had disappeared from certain languages, a theory born out in his study of Hittite. In addition to Memoire on the Original System of Vowels in Indo-European Languages, in this most famous work, he drew a distinction between systemic and diachronic linguistics and hypothesized that languages was merely a system of signs. For ten points, identify this linguist, whose ideas were collected from his lecture notes in Course on General Linguistics.
Output (English): Social Science