History of linguistics (20th century) ; Phylogenese; Biolinguistics ; Neurolinguistics ; Minimalist program; Generative theory of language ; Innate ideas hypothesis; Poverty of the stimulus-argument; Lernbarkeit (von Sprache) ; Learnability (of language) ; Nature/nurture; Logisches Problem (Spracherwerb) ; Logical problem (language acquisition) ; Nativist hypothesis