I'm sure this has been covered, but I can't find a way to narrow a search down enough. Quick example: an Arkham encounter says "Make a Will -2 check or you are escorted to the street". You want to go to the street, but your will is set to 4. Do you have to roll the two dice and accept the result? Or can you just choose to fail?
I couldn't find a rule or errata to address this. Thanks for any help.