context: We doubt that John moved to the garden. It is probably not the case that Bernhard is a lion. It is likely that Jessica is a cat. It is likely that if 'Jessica is a cat' or 'John moved to the garden' or both then Greg is a rhino. We doubt that if 'John moved to the garden' or 'Jessica is a cat' or both then Lily is a swan. It is certain that if 'Jessica is a cat' or 'John moved to the garden' or both then Julius is yellow.
hypothesis: It is highly unlikely that 'John moved to the garden and Lily is a swan'.
valid_hypothesis: It is highly unlikely that 'John moved to the garden and Lily is a swan'.
invalid_hypothesis: It is probable that 'John moved to the garden and Lily is a swan'.
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
    0.2::factA.
    0.25::factB.
    0.7::factC.
    %hop1
    0.7::factX:-or(factC,factA).
    0.2::factY:-or(factA,factC).
    1.0::factZ:-or(factC,factA).
  
    %hop2
    conclusion:-and(factA,factY).
  
    query(conclusion).
    
hypothesis_assertion: 'John moved to the garden and Lily is a swan'.