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.
For example, French and Spanish both come from Latin. Most words are said a little differently in Spanish and French, so the two are called different languages. Most languages belong to a language family, but some languages do not. These languages are called Language isolates. There also are Constructed languages, like for example Esperanto. Constructed languages are made for different reasons: making a 'world language', for fun, for use in fiction, etc.