context: It is certain that Mary dropped the milk. It is improbable that Emily is a mouse. There is a better than even chance that John took the apple.
hypothesis: Chances are slight that 'Emily is a mouse' or 'Mary dropped the milk' or both.
valid_hypothesis: It is certain that 'Emily is a mouse' or 'Mary dropped the milk' or both.
invalid_hypothesis: Chances are slight that 'Emily is a mouse' or 'Mary dropped the milk' 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
    1.0::factA.
    0.1::factB.
    0.6::factC.
    
  
    %hop2
    conclusion:-or(factB,factA).
  
    query(conclusion).
    
hypothesis_assertion: 'Emily is a mouse' or 'Mary dropped the milk' or both.