There is little chance that Winona is a mouse. We doubt that Brian is gray. It is unlikely that Julius is a swan. It is unlikely that if 'Winona is a mouse' or 'Julius is a swan' or both then Jason is tired. We believe that if 'Brian is gray and Julius is a swan' then John went to the office. It is highly likely that if 'Julius is a swan and Brian is gray' then Bernhard is a rhino.
It is likely that 'Winona is a mouse' or 'Julius is a swan' or both.
It is probably not the case that 'Winona is a mouse' or 'Julius is a swan' or both.
It is likely that 'Winona is a mouse' or 'Julius 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
  0.1::factA.
  0.2::factB.
  0.2::factC.
  %hop1
  0.2::factX:-or(factA,factC).
  0.75::factY:-and(factB,factC).
  0.9::factZ:-and(factC,factB).

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

  query(conclusion).
  
'Winona is a mouse' or 'Julius is a swan' or both.