context: It is highly likely that Mary grabbed the milk. There is a very good chance that Bernhard is a frog. There is a very good chance that John moved to the garden.
hypothesis: It is probably the case that 'John moved to the garden and Mary grabbed the milk'.
valid_hypothesis: It is probably the case that 'John moved to the garden and Mary grabbed the milk'.
invalid_hypothesis: It is highly unlikely that 'John moved to the garden and Mary grabbed the milk'.
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
    0.9::factA.
    0.8::factB.
    0.8::factC.
    
  
    %hop2
    conclusion:-and(factC,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'John moved to the garden and Mary grabbed the milk'.