Which of the following statements is false?
A)Every context-sensitive language is recursive.
B)The set of all languages that are not recursively enumerable is countable.
C)The family of recursively enumerable languages is closed under union.
D)The families of recursively enumerable and recursive languages are closed under reversal

Question

Quizplus · Accepted Answer

The set of all languages that are not recursively enumerable is uncountable. This is because the set of all possible languages over a finite alphabet is uncountable, and the set of recursively enumerable languages is countable, leaving an uncountable number of languages that are not recursively enumerable.

Which of the Following Statements Is False