context: It is unlikely that Bernhard is yellow. It is almost certain that Mary put down the apple. It is highly unlikely that John picked up the apple.
hypothesis: It is highly unlikely that 'John picked up the apple and Mary put down the apple'.
valid_hypothesis: It is highly unlikely that 'John picked up the apple and Mary put down the apple'.
invalid_hypothesis: It is likely that 'John picked up the apple and Mary put down the apple'.
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.
    0.95::factB.
    0.05::factC.
    
  
    %hop2
    conclusion:-and(factC,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'John picked up the apple and Mary put down the apple'.