context: It is highly unlikely that Sandra dropped the milk. We doubt that Brian is a rhino. There is little chance that Emily is a mouse.
hypothesis: There is almost no chance that 'Brian is a rhino and Emily is a mouse'.
valid_hypothesis: There is almost no chance that 'Brian is a rhino and Emily is a mouse'.
invalid_hypothesis: It is highly likely that 'Brian is a rhino and Emily is a mouse'.
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.
    0.2::factB.
    0.1::factC.
    
  
    %hop2
    conclusion:-and(factB,factC).
  
    query(conclusion).
    
hypothesis_assertion: 'Brian is a rhino and Emily is a mouse'.