|The relation of language and thought: this problem has been discussed since ancient philosophy and is today present in psychological research. It runs down to the question whether speechless animals are able to have thoughts. See also language, animal language, meaning, signs, communication, thinking, world/thinking._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments.