It is impossible that Lily is gray. There is little chance that Emily is a wolf. It is unlikely that Julius is a swan. It is probably not the case that if either 'Julius is a swan' or 'Lily is gray' but not both then Antoine is hungry. It is impossible that if 'Emily is a wolf' or 'Julius is a swan' or both then Greg is white. It is improbable that if 'Lily is gray and Emily is a wolf' then John got the apple.
It is impossible that 'Antoine is hungry and Lily is gray'.
It is impossible that 'Antoine is hungry and Lily is gray'.
It is almost certain that 'Antoine is hungry and Lily is gray'.

  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
  0.0::factA.
  0.1::factB.
  0.2::factC.
  %hop1
  0.25::factX:-xor(factC,factA).
  0.0::factY:-or(factB,factC).
  0.1::factZ:-and(factA,factB).

  %hop2
  conclusion:-and(factX,factA).

  query(conclusion).
  
'Antoine is hungry and Lily is gray'.