Tarskian semantics model-theoretic semantics tautology [Grk tautologeĩn ‘to repeat what has been said’]

Artificial or stylized language spoken by the second (or foreign) language instructor with the purpose of conveying meaningful information to the language learners. Teacher-talk, which is similar to other forms of caretaker language, is often characterized by shorter sentences, reduced grammar and vocabulary, slower speech tempo, careful articulation, and continual comprehension checks.