context: There is a very good chance that Jason is tired. There is a very good chance that Julius is a swan. There is little chance that John got the apple.
hypothesis: There is little chance that 'John got the apple and Jason is tired'.
valid_hypothesis: There is little chance that 'John got the apple and Jason is tired'.
invalid_hypothesis: It is certain that 'John got the apple and Jason is tired'.
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
    0.8::factA.
    0.8::factB.
    0.1::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'John got the apple and Jason is tired'.