context: We believe that John moved to the garden. It is highly likely that Bernhard is a lion. We believe that Jessica is a cat. There is almost no chance that if either 'Jessica is a cat' or 'Bernhard is a lion' but not both then Greg is a rhino. It is probably not the case that if 'John moved to the garden' or 'Bernhard is a lion' or both then Winona is a sheep. It is impossible that if 'Bernhard is a lion' or 'John moved to the garden' or both then Bill went to the office.
hypothesis: It is probable that 'John moved to the garden and Winona is a sheep'.
valid_hypothesis: We doubt that 'John moved to the garden and Winona is a sheep'.
invalid_hypothesis: It is probable that 'John moved to the garden and Winona is a sheep'.
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
    0.75::factA.
    0.9::factB.
    0.75::factC.
    %hop1
    0.02::factX:-xor(factC,factB).
    0.25::factY:-or(factA,factB).
    0.0::factZ:-or(factB,factA).
  
    %hop2
    conclusion:-and(factA,factY).
  
    query(conclusion).
    
hypothesis_assertion: 'John moved to the garden and Winona is a sheep'.