context: It is unlikely that Jessica is a sheep. It is unlikely that Bernhard is a rhino. It is certain that Julius is a frog.
hypothesis: It is likely that 'Jessica is a sheep and Bernhard is a rhino'.
valid_hypothesis: It is highly unlikely that 'Jessica is a sheep and Bernhard is a rhino'.
invalid_hypothesis: It is likely that 'Jessica is a sheep and Bernhard 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
    0.2::factA.
    0.2::factB.
    1.0::factC.
    
  
    %hop2
    conclusion:-and(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Jessica is a sheep and Bernhard is a rhino'.