context: It is almost certain that Brian is a lion. It is probably not the case that Sandra left the milk. It is unlikely that Mary moved to the garden.
hypothesis: It is highly unlikely that 'Sandra left the milk' or 'Mary moved to the garden' or both.
valid_hypothesis: Chances are about even that 'Sandra left the milk' or 'Mary moved to the garden' or both.
invalid_hypothesis: It is highly unlikely that 'Sandra left the milk' or 'Mary moved to the garden' or both.
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.
    0.25::factB.
    0.2::factC.
    
  
    %hop2
    conclusion:-or(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Sandra left the milk' or 'Mary moved to the garden' or both.