context: There is little chance that Mary put down the apple. There is almost no chance that Bernhard is yellow. It is probable that Sandra took the football.
hypothesis: There is almost no chance that 'Sandra took the football and Bernhard is yellow'.
valid_hypothesis: There is almost no chance that 'Sandra took the football and Bernhard is yellow'.
invalid_hypothesis: It is highly likely that 'Sandra took the football and Bernhard is yellow'.
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
    0.1::factA.
    0.02::factB.
    0.7::factC.
    
  
    %hop2
    conclusion:-and(factC,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Sandra took the football and Bernhard is yellow'.