context: It is highly unlikely that Brian is a lion. It is probable that Julius is a rhino. It is probably the case that Bernhard is green. It is likely that if 'Bernhard is green' or 'Brian is a lion' or both then Winona is a wolf. It is probably not the case that if either 'Bernhard is green' or 'Julius is a rhino' but not both then John moved to the garden. It is probably not the case that if 'Bernhard is green and Julius is a rhino' then Greg is white.
hypothesis: It is probable that 'Winona is a wolf and Brian is a lion'.
valid_hypothesis: It is highly unlikely that 'Winona is a wolf and Brian is a lion'.
invalid_hypothesis: It is probable that 'Winona is a wolf and Brian is a lion'.
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
    0.05::factA.
    0.7::factB.
    0.7::factC.
    %hop1
    0.7::factX:-or(factC,factA).
    0.25::factY:-xor(factC,factB).
    0.25::factZ:-and(factC,factB).
  
    %hop2
    conclusion:-and(factX,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Winona is a wolf and Brian is a lion'.