It is unlikely that Julius is a frog. It is probable that Daniel took the apple. It is probable that John moved to the garden. It is likely that if either 'John moved to the garden' or 'Julius is a frog' but not both then Lily is a swan. It is impossible that if 'Daniel took the apple' or 'John moved to the garden' or both then Bernhard is a lion. It is almost certain that if 'Daniel took the apple' or 'John moved to the garden' or both then Mary left the milk.
It is highly likely that 'Julius is a frog' or 'Mary left the milk' or both.
It is highly likely that 'Julius is a frog' or 'Mary left the milk' or both.
It is impossible that 'Julius is a frog' or 'Mary left the milk' 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
  0.2::factA.
  0.7::factB.
  0.7::factC.
  %hop1
  0.7::factX:-xor(factC,factA).
  0.0::factY:-or(factB,factC).
  0.95::factZ:-or(factB,factC).

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

  query(conclusion).
  
'Julius is a frog' or 'Mary left the milk' or both.