context: There is a very good chance that Julius is a frog. Chances are about even that Mary went to the bedroom. It is impossible that Emily is a mouse.
hypothesis: It is impossible that 'Emily is a mouse' or 'Mary went to the bedroom' or both.
valid_hypothesis: Chances are about even that 'Emily is a mouse' or 'Mary went to the bedroom' or both.
invalid_hypothesis: It is impossible that 'Emily is a mouse' or 'Mary went to the bedroom' 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
    0.8::factA.
    0.5::factB.
    0.0::factC.
    
  
    %hop2
    conclusion:-or(factC,factB).
  
    query(conclusion).
    
hypothesis_assertion: 'Emily is a mouse' or 'Mary went to the bedroom' or both.