Erkenntnistheorie und Wissen; Epistemology and knowledge; Apriori-Wissen; Apriori knowledge; Knowledge (epistemology) ; Mental representation (language acquisition) ; Object individuation; Conceptual development; Konzept (Spracherwerb) ; Concept formation ; Spracherwerb und neurologische Entwicklung; Language acquisition and neurological development; Sprache und Denken (Ontogenese) ; Language and thought (ontogenesis) ; Cognitive development; Language acquisition and cognitive development ; Sozioemotionale Entwicklung; Socioemotional development; Language acquisition and psychological development ; Social constructionism; Sozialkonstruktivismus; Constructivism (philosophy)