in mathematical linguistics nonetheless remained limited in general linguistics in Europe. The situation was different in the US where Franz Boas imported Wundt's.ideas to form the Boasian school of anthropology. His students included linguists Edward Sapir and Benjamin Whorf. Leonard Bloomfield, on the other hand, traveled to Germany to attend Wundt's lectures in linguistics. Based on his ideas, Bloomfield wrote his 1914 textbook An Introduction to the Study of Language becoming the leading figure in American linguistics until his death in 1949. Bloomfield proposed a "philosophical-descriptive" approach to the study of language suggesting that the linguist's task is to document and analyze linguistic samples leaving further theoretical questions to psychologists. The post-Bloomfieldian school of the 1950s was also increasingly keen on mathematical linguistics. Based on Carnap's model of arithmetic syntax, Zellig Harris and Charles Hockett proposed a version of generative grammar whose ultimate purpose is just to generate grammatical word sequences. They advocated distributionalism as an attempt to define syntactic constitutes. It was suggested, for example, that a noun phrase like a beautiful home is not based on its meaning constitution, but on the fact that such words (determiner, adjective, noun) tend to appear jointly in texts. This attempt was abandoned after Noam Chomsky proposed that the study of syntax is the study of knowledge of language, and therefore a cognitive science. His justification for the analysis became that the syntactic structures uncovered by a generative linguist are innate and based on a random genetic mutation. Chomsky has argued since the beginning that mathematics has no explanatory value for linguistics which he defines as a sub-field of cognitive psychology. Therefore, his approach is opposed to game formalism. "When generative grammar was being first developed, a language was defined as a set of sentences, generated by the rules of a grammar, where ‘‘generated’’ is a term taken over from mathematics and just means formally or rigorously described [...} Chomsky’s early work included a demonstration that any such definition of language could not have a decisive role to play in linguistic theory."In other words, Chomsky's psychologism replaced mathematical formalism in generative linguistics in the 1960s. Chomsky does not however argue against formalism or logicism in mathematics, only that such approaches are not relevant to the study of natural language. He is nonetheless interested in the precise form of the correct syntactic representation. When developing his theory, Chomsky took influences from molecular biology.