The end of the 19th century witnessed the emergence of yet another strand of relativism motivated by empirical-psychological and physiological interpretations of Kantian categories. The view, known as species relativism, and defended by neo-Kantian psychologists such as Theodore Lipps (1851–1914), holds that the rules of logic are products of the human mind and psychology and therefore may be unique to the human species; different species could have and use different logical principles. The view was vehemently, but quite effectively, attacked by Frege and Husserl as part of their arguments against what they called “psychologism” and “speciesism” (Kusch 1995: 47). Logic in this approach is identified with the actual thinking processes of individuals or communities and its authority is seen to be local, or relative to the practices of particular epistemic groupings. But Frege and Husserl argued that with such relativization we would lose the ability to distinguish between reasoning correctly and merely seeming to do so.