context: Chances are about even that Emily is a wolf. It is almost certain that Jessica is a mouse. It is likely that Daniel got the football. There is a very good chance that if 'Jessica is a mouse' or 'Daniel got the football' or both then Greg is a frog. We believe that if either 'Daniel got the football' or 'Jessica is a mouse' but not both then Mary moved to the office. It is unlikely that if 'Emily is a wolf' or 'Jessica is a mouse' or both then Brian is green.
hypothesis: It is almost certain that 'Brian is green' or 'Jessica is a mouse' or both.
valid_hypothesis: It is almost certain that 'Brian is green' or 'Jessica is a mouse' or both.
invalid_hypothesis: There is almost no chance that 'Brian is green' or 'Jessica is a mouse' or both.
problog: 
    and(A,B) :- A,B.
    or(A,B) :- A;B.
    nand(A,B) :- not(and(A,B)).
    nor(A,B) :- not(or(A,B)).
    xor(A,B) :- or(A,B), nand(A,B).
  
    %hop0
    0.5::factA.
    0.95::factB.
    0.7::factC.
    %hop1
    0.8::factX:-or(factB,factC).
    0.75::factY:-xor(factC,factB).
    0.2::factZ:-or(factA,factB).
  
    %hop2
    conclusion:-or(factZ,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Brian is green' or 'Jessica is a mouse' or both.