We believe that Greg is a swan. It is almost certain that Daniel dropped the milk. It is highly likely that Winona is a cat. It is almost certain that if 'Winona is a cat' or 'Daniel dropped the milk' or both then Mary moved to the office. It is likely that if 'Winona is a cat and Greg is a swan' then John grabbed the apple. There is almost no chance that if 'Greg is a swan and Daniel dropped the milk' then Julius is gray.
Chances are about even that 'Winona is a cat and John grabbed the apple'.
Chances are about even that 'Winona is a cat and John grabbed the apple'.
It is almost certain that 'Winona is a cat and John grabbed the apple'.

  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
  0.75::factA.
  0.95::factB.
  0.9::factC.
  %hop1
  0.95::factX:-or(factC,factB).
  0.7::factY:-and(factC,factA).
  0.02::factZ:-and(factA,factB).

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

  query(conclusion).
  
'Winona is a cat and John grabbed the apple'.