It is likely that Greg is a frog. There is a better than even chance that Emily is a sheep. It is highly likely that Mary moved to the garden. Chances are about even that if either 'Greg is a frog' or 'Emily is a sheep' but not both then Lily is a rhino. It is probable that if either 'Greg is a frog' or 'Mary moved to the garden' but not both then John went to the kitchen. We doubt that if either 'Mary moved to the garden' or 'Emily is a sheep' but not both then Daniel got the milk.
It is impossible that either 'Mary moved to the garden' or 'Lily is a rhino' but not both.
It is probably the case that either 'Mary moved to the garden' or 'Lily is a rhino' but not both.
It is impossible that either 'Mary moved to the garden' or 'Lily is a rhino' 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
  0.7::factA.
  0.6::factB.
  0.9::factC.
  %hop1
  0.5::factX:-xor(factA,factB).
  0.7::factY:-xor(factA,factC).
  0.2::factZ:-xor(factC,factB).

  %hop2
  conclusion:-xor(factC,factX).

  query(conclusion).
  
Either 'Mary moved to the garden' or 'Lily is a rhino' but not both.