    Sentence’ 1:.What/are" the {wo , siniple  wort responses to adecision problem?    Senténed 2: A:degision problem. cari be  viewed as‘a fowinal language: where the.  members-@f thé lariguage- aré instances  whose eutput'is..yes: and -the! non-  mémbers, aré’ those ‘instances, “whose  output ising :