Sprache und Denken; Erkenntnis und Sprache; Language and thought; Erkenntnistheorie; Epistemology and language; Language and epistemology ; Erkenntnistheorie und Wissen; Epistemology and knowledge; Apriori-Wissen; Apriori knowledge; Knowledge (epistemology) ; Mental representation (language acquisition) ; Object individuation; Conceptual development; Konzept (Spracherwerb) ; Concept formation ; Natural logic ; Social constructionism; Sozialkonstruktivismus; Constructivism (philosophy) ; Theory of language