A book by this philosopher describes that people first held “naïve monism,” in which no distinction is made between natural and normative laws, as the first step in a process that ends with “critical dualism.” In a 1967 lecture, this philosopher claimed that the universe only had one world at its inception, but a second one emerged from biological evolution and a third from human’s “products of thoughts.” This thinker argued that scientific theories should be risky and prohibitive as a part of a solution to the demarcation problem. That solution revolves around this thinker’s most famous concept, found in the book The Logic of Scientific Discovery, which is demonstrated with the finding of a black swan proving that every swan (10[1])is not white. For 10 points, name this Austrian-born philosopher of science who invented the concept of falsifiability. ■END■ (10[1]0[2])