It is probably the case that Winona is a wolf. It is probably not the case that Lily is a frog. It is probable that Mary dropped the milk. It is probable that if either 'Mary dropped the milk' or 'Winona is a wolf' but not both then Greg is a lion. It is likely that if either 'Winona is a wolf' or 'Lily is a frog' but not both then Bill went to the garden. It is unlikely that if 'Mary dropped the milk' or 'Lily is a frog' or both then Brian is a rhino.
It is highly unlikely that 'Bill went to the garden and Lily is a frog'.
It is highly unlikely that 'Bill went to the garden and Lily is a frog'.
It is certain that 'Bill went to the garden and Lily is a frog'.

  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.
  0.25::factB.
  0.7::factC.
  %hop1
  0.7::factX:-xor(factC,factA).
  0.7::factY:-xor(factA,factB).
  0.2::factZ:-or(factC,factB).

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

  query(conclusion).
  
'Bill went to the garden and Lily is a frog'.