context: It is highly unlikely that Brian is a lion. It is certain that Lily is a frog. It is probably not the case that Bernhard is a lion.
hypothesis: There is almost no chance that 'Lily is a frog' or 'Brian is a lion' or both.
valid_hypothesis: It is certain that 'Lily is a frog' or 'Brian is a lion' or both.
invalid_hypothesis: There is almost no chance that 'Lily is a frog' or 'Brian 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
    0.05::factA.
    1.0::factB.
    0.25::factC.
    
  
    %hop2
    conclusion:-or(factB,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Lily is a frog' or 'Brian is a lion' or both.