context: It is almost certain that Winona is a wolf. It is highly unlikely that Yann is thirsty. There is a very good chance that Brian is a rhino. It is certain that if 'Winona is a wolf' or 'Yann is thirsty' or both then Jason is bored. It is probably the case that if either 'Brian is a rhino' or 'Winona is a wolf' but not both then John got the milk. It is highly unlikely that if 'Winona is a wolf' or 'Yann is thirsty' or both then Julius is gray.
hypothesis: There is a very good chance that 'Jason is bored and John got the milk'.
valid_hypothesis: Chances are slight that 'Jason is bored and John got the milk'.
invalid_hypothesis: There is a very good chance that 'Jason is bored and John got the milk'.
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
    0.95::factA.
    0.05::factB.
    0.8::factC.
    %hop1
    1.0::factX:-or(factA,factB).
    0.7::factY:-xor(factC,factA).
    0.05::factZ:-or(factA,factB).
  
    %hop2
    conclusion:-and(factX,factY).
  
    query(conclusion).
    
hypothesis_assertion: 'Jason is bored and John got the milk'.