Chances are slight that Brian is green. It is likely that Julius is a frog. It is almost certain that Lily is a lion. It is probable that if 'Julius is a frog and Lily is a lion' then Sumit is tired. It is highly likely that if either 'Lily is a lion' or 'Brian is green' but not both then Mary went to the kitchen. It is probably not the case that if either 'Julius is a frog' or 'Lily is a lion' but not both then John dropped the apple.
It is probably not the case that either 'Lily is a lion' or 'Julius is a frog' but not both.
It is probably not the case that either 'Lily is a lion' or 'Julius is a frog' but not both.
It is certain that either 'Lily is a lion' or 'Julius is a frog' 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
  0.1::factA.
  0.7::factB.
  0.95::factC.
  %hop1
  0.7::factX:-and(factB,factC).
  0.9::factY:-xor(factC,factA).
  0.25::factZ:-xor(factB,factC).

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

  query(conclusion).
  
Either 'Lily is a lion' or 'Julius is a frog' but not both.