context: There is a very good chance that John went to the garden. It is probable that Lily is yellow. There is almost no chance that Julius is a rhino.
hypothesis: There is a better than even chance that 'Lily is yellow and John went to the garden'.
valid_hypothesis: There is a better than even chance that 'Lily is yellow and John went to the garden'.
invalid_hypothesis: It is highly unlikely that 'Lily is yellow and John went to the garden'.
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.
    0.7::factB.
    0.02::factC.
    
  
    %hop2
    conclusion:-and(factB,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Lily is yellow and John went to the garden'.