It is almost certain that Bernhard is a swan. It is probable that Gertrude is a sheep. We believe that John moved to the garden. It is certain that if either 'John moved to the garden' or 'Gertrude is a sheep' but not both then Brian is white. It is unlikely that if either 'Gertrude is a sheep' or 'Bernhard is a swan' but not both then Winona is a wolf. It is impossible that if 'Bernhard is a swan and Gertrude is a sheep' then Lily is a rhino.
It is almost certain that 'Winona is a wolf' or 'Bernhard is a swan' or both.
It is almost certain that 'Winona is a wolf' or 'Bernhard is a swan' or both.
We doubt that 'Winona is a wolf' or 'Bernhard is a swan' or both.

  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.
  0.75::factC.
  %hop1
  1.0::factX:-xor(factC,factB).
  0.2::factY:-xor(factB,factA).
  0.0::factZ:-and(factA,factB).

  %hop2
  conclusion:-or(factY,factA).

  query(conclusion).
  
'Winona is a wolf' or 'Bernhard is a swan' or both.