Chances are slight that Julius is white. There is a better than even chance that John moved to the garden. It is almost certain that Greg is a lion. Chances are slight that if 'Greg is a lion and Julius is white' then Lily is a rhino. Chances are slight that if 'Greg is a lion and John moved to the garden' then Mary took the milk. Chances are about even that if 'Greg is a lion and John moved to the garden' then Bernhard is gray.
It is unlikely that 'Mary took the milk' or 'Greg is a lion' or both.
It is almost certain that 'Mary took the milk' or 'Greg is a lion' or both.
It is unlikely that 'Mary took the milk' or 'Greg is a lion' 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
  0.1::factA.
  0.6::factB.
  0.95::factC.
  %hop1
  0.1::factX:-and(factC,factA).
  0.1::factY:-and(factC,factB).
  0.5::factZ:-and(factC,factB).

  %hop2
  conclusion:-or(factY,factC).

  query(conclusion).
  
'Mary took the milk' or 'Greg is a lion' or both.