There is a better than even chance that Lily is a frog. It is likely that Emily is a sheep. It is probable that Julius is white. It is highly unlikely that if either 'Emily is a sheep' or 'Julius is white' but not both then Antoine is bored. Chances are slight that if 'Julius is white' or 'Emily is a sheep' or both then Bill moved to the office. It is impossible that if either 'Emily is a sheep' or 'Lily is a frog' but not both then Bernhard is a rhino.
Chances are about even that either 'Lily is a frog' or 'Emily is a sheep' but not both.
Chances are about even that either 'Lily is a frog' or 'Emily is a sheep' but not both.
It is highly unlikely that either 'Lily is a frog' or 'Emily is a sheep' but not 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
  0.6::factA.
  0.7::factB.
  0.7::factC.
  %hop1
  0.05::factX:-xor(factB,factC).
  0.1::factY:-or(factC,factB).
  0.0::factZ:-xor(factB,factA).

  %hop2
  conclusion:-xor(factA,factB).

  query(conclusion).
  
Either 'Lily is a frog' or 'Emily is a sheep' but not both.