Consider the brief case domain. A system conguration is (0,O1) where 0 is

obs(up(1),true,0).

obs(up(2),true,0).

hpd(toggle(1),0).

and O1 is

obs(open,true,1).

3.1) Using your common sense knowledge about the brief case, is the system conguration above a symptom (note the denition of symptom)? Why? What would be an explanation?

3.2) Assume we have an action break(I) which makes clasp I dis-functioning. Write an AL system description for the briefcase domain. You description should including exogenous action break(I).