call the ACL2 theorem prover's simplifier
Major Section: PROOF-CHECKER-COMMANDS
Examples:
bash -- attempt to prove the current goal by simplification alone
(bash ("Subgoal 2" :by foo) ("Subgoal 1" :use bar))
     -- attempt to prove the current goal by simplification alone,
        with the indicated hints
General Form:
(bash &rest hints)
Call the theorem prover's simplifier, creating a subgoal for each
resulting goal.
Notice that unlike prove, the arguments to bash are spread out, and
are all hints.
Note:  All forcing rounds will be skipped (unless there are more
than 15 subgoals generated in the first forcing round, an injustice
that should be rectified by the next release).