context: It is likely that Jessica is a cat. It is probably the case that Julius is yellow. It is highly likely that Lily is a lion. It is probably not the case that if 'Lily is a lion' or 'Julius is yellow' or both then Mary went to the office. Chances are slight that if 'Julius is yellow' or 'Jessica is a cat' or both then Antoine is bored. It is unlikely that if either 'Lily is a lion' or 'Julius is yellow' but not both then Bernhard is green.
hypothesis: It is unlikely that 'Jessica is a cat and Mary went to the office'.
valid_hypothesis: It is unlikely that 'Jessica is a cat and Mary went to the office'.
invalid_hypothesis: It is almost certain that 'Jessica is a cat and Mary went to the office'.
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
    0.7::factA.
    0.7::factB.
    0.9::factC.
    %hop1
    0.25::factX:-or(factC,factB).
    0.1::factY:-or(factB,factA).
    0.2::factZ:-xor(factC,factB).
  
    %hop2
    conclusion:-and(factA,factX).
  
    query(conclusion).
    
hypothesis_assertion: 'Jessica is a cat and Mary went to the office'.