context: It is almost certain that Sandra left the apple. It is probably the case that Mary went to the garden. It is probably not the case that Julius is a lion.
hypothesis: There is a very good chance that 'Mary went to the garden' or 'Julius is a lion' or both.
valid_hypothesis: There is a very good chance that 'Mary went to the garden' or 'Julius is a lion' or both.
invalid_hypothesis: It is impossible that 'Mary went to the garden' or 'Julius is a lion' 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.
    0.7::factB.
    0.25::factC.
    
  
    %hop2
    conclusion:-or(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Mary went to the garden' or 'Julius is a lion' or both.