Task: Text Categorization
Input (English): In this work, it is alleged that philosophy is not itself one of the natural sciences, but must serve only to elucidate the natural sciences. At one point in this work, it's author uses functions to prove that 1+1=2 in order to demonstrate the needlessness of the principia mathematica. It is later claimed by the author that the "I" can be nowhere found in sensory experience and is exactly as the eye is to the visual spectrum, nowhere to be derived from it. In its fourth section, its author invented the truth table and began work on defining a truth function through a generalized "nand. " Beginning with the line "The world is all that is the case" and ending with an exhortation to discard the work like a ladder once the heights have been climbed, this is, for 10 points, what book consisting of numbered statements named after a treatise by Spinoza, by Ludwig Wittgenstein
Output (English): Social Science