It is probably not the case that Winona is a wolf. There is almost no chance that Lily is a rhino. It is highly unlikely that Sandra grabbed the milk. There is a very good chance that if 'Winona is a wolf' or 'Sandra grabbed the milk' or both then Bernhard is gray. It is highly likely that if either 'Sandra grabbed the milk' or 'Winona is a wolf' but not both then Brian is a lion. It is probable that if 'Sandra grabbed the milk and Winona is a wolf' then Mary went to the kitchen.
There is almost no chance that 'Sandra grabbed the milk and Winona is a wolf'.
There is almost no chance that 'Sandra grabbed the milk and Winona is a wolf'.
It is probably the case that 'Sandra grabbed the milk and Winona is a wolf'.

  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
  0.25::factA.
  0.02::factB.
  0.05::factC.
  %hop1
  0.8::factX:-or(factA,factC).
  0.9::factY:-xor(factC,factA).
  0.7::factZ:-and(factC,factA).

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

  query(conclusion).
  
'Sandra grabbed the milk and Winona is a wolf'.