The Question command

The question command ( :? ) is used to verify a statement. If your statement is correct, then Grafstate will respond with the answer Yes. Otherwise, you will receive a brief description of why the statement is false.

The question command has the following instructions∶
Instruction
Description
Verify that two regular structures (e.g., a DFA and a regular expression) recognize the same language.
Verify that a proposed transition is a valid preservation path in a GNFA.
Verify that a sequence of strings in a given language is in short lexicographical order.
∶? instructions