1. In the 1970s, this theory came under attack from two-dimensional semantic theories . 2. The system also needs a " semantic theory  " to guide the comprehension. 3. The semantic theory  is summarized further below in this article. 4. Semantic theories  implicitly or explicitly incorporating the mentalist postulate include force dynamics and conceptual semantics.5. The interpretation capabilities of a language understanding system depend on the semantic theory  it uses. 6. Meanwhile, cognitive semantic theories  are typically built on the argument that lexical meaning is conceptual. 7. Baldinger originally published his " Semantic Theory  : Toward a Modern Semantics " ( Madrid, ed. 8. The main modern approach is " model-theoretic semantics ", based on Alfred Tarski's semantic theory  of truth. 9. Situation semantics is the first semantic theory  that was used in Head-driven phrase structure grammar ( HPSG ). 10. By domain is meant the universe of discourse of a model for the semantic theory  of a logic.