III. return the bill to Congress for clarification on some point within the bill IV. allow the Congress to pocket veto the bill, thereby allowing the bill to become law without his signature a.
Decidability. Definition: A language is called decidable if there exists a method-any method at all-to determine whether a given word belongs to that language or not. Working hypothesis I: Decidability is well defined above.roof: Surely, a decidable language is recognizable. Moreover, if a language is decidable, then so is its complement, and hence that complement is recognizable. Now suppose a language L and its complement are recognizable. Let A be a recognizer for L, and B for its complement.
Recursion, in sum, allows language to become an infinite system. The Chomskyan view is that this ability is quite special, unique to humans. It is, in essence, what distinguishes us from other animals-the source of complex thought and communication, and thus complex mathematical, artistic and linguistic ability.Abe and Watanabe's study shows that songbirds are able to process a recursive grammar-this is perhaps the most significant aspect of their paper.ore on that later. First, a summary of the study: An influential hypothesis, put forward by Noam Chomsky and colleagues, is that one ability-recursion-enables language, and that humans are alone in having this capacity.