It is certain that Mary got the football. There is almost no chance that Sandra dropped the milk. It is improbable that Brian is a frog. There is a very good chance that if either 'Sandra dropped the milk' or 'Brian is a frog' but not both then Julius is a swan. It is probably the case that if 'Sandra dropped the milk' or 'Mary got the football' or both then John went to the garden. There is a better than even chance that if 'Mary got the football' or 'Sandra dropped the milk' or both then Lily is a lion.
It is probable that 'Lily is a lion and Sandra dropped the milk'.
There is almost no chance that 'Lily is a lion and Sandra dropped the milk'.
It is probable that 'Lily is a lion and Sandra dropped the milk'.

  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
  1.0::factA.
  0.02::factB.
  0.1::factC.
  %hop1
  0.8::factX:-xor(factB,factC).
  0.7::factY:-or(factB,factA).
  0.6::factZ:-or(factA,factB).

  %hop2
  conclusion:-and(factZ,factB).

  query(conclusion).
  
'Lily is a lion and Sandra dropped the milk'.