效绵鼎 Context-Free Languages A language that is defined by some CFG is called a context-free language. There are CFL's that are not regular languages, such as the example just given. But not all languages are CFL's. Intuitively:CFL's can count two things,not three. ,16Context-Free Languages ◼ A language that is defined by some CFG is called a context-free language. ◼ There are CFL’s that are not regular languages, such as the example just given. ◼ But not all languages are CFL’s. ◼ Intuitively: CFL’s can count two things, not three. 16