Phylogenese; Language origin ; Tiersprache; Animal communication; Vogelgesang; Birdsong; Zoosemiotics ; Evolution (theory of) ; Theory of evolution ; Praxiology; Action theory ; Sociology of translation; Language and social studies ; 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