Task: Text Categorization
Input (English): For works like 1905's Knowledge and Misunderstanding, this thinker became one of the founders of a realistic philosophy known as Empiriokritizismus. His main works, translated as The Analysis of Sensations and The Science of Mechanics, have led many to call him the father of logical positivism, and he greatly influenced Einstein with his principle stating that a body can have no inertia in a universe devoid of other mass. FTP, who was this Austrian philosopher for whom the ratio of an object's speed to the speed of sound is named
Output (English): Social Science