context: It is probably not the case that Jessica is a cat. Chances are about even that Greg is a frog. There is a better than even chance that Lily is a rhino.
hypothesis: It is highly likely that 'Jessica is a cat and Lily is a rhino'.
valid_hypothesis: There is little chance that 'Jessica is a cat and Lily is a rhino'.
invalid_hypothesis: It is highly likely that 'Jessica is a cat and Lily is a rhino'.
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
    0.25::factA.
    0.5::factB.
    0.6::factC.
    
  
    %hop2
    conclusion:-and(factA,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Jessica is a cat and Lily is a rhino'.