context: It is almost certain that Brian is green. It is probably the case that John picked up the apple. It is highly likely that Lily is yellow.
hypothesis: It is probably not the case that 'Brian is green and John picked up the apple'.
valid_hypothesis: It is probable that 'Brian is green and John picked up the apple'.
invalid_hypothesis: It is probably not the case that 'Brian is green and John picked up 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
    0.95::factA.
    0.7::factB.
    0.9::factC.
    
  
    %hop2
    conclusion:-and(factA,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Brian is green and John picked up the apple'.