Chances are about even that Mary picked up the milk. It is probably not the case that Julius is a swan. There is little chance that Daniel got the football. It is likely that if either 'Daniel got the football' or 'Julius is a swan' but not both then John went to the kitchen. We believe that if 'Julius is a swan and Daniel got the football' then Emily is a wolf. It is almost certain that if either 'Julius is a swan' or 'Daniel got the football' but not both then Jessica is a cat.
It is impossible that 'Emily is a wolf and Mary picked up the milk'.
It is impossible that 'Emily is a wolf and Mary picked up the milk'.
Chances are about even that 'Emily is a wolf and Mary picked up 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
  0.5::factA.
  0.25::factB.
  0.1::factC.
  %hop1
  0.7::factX:-xor(factC,factB).
  0.75::factY:-and(factB,factC).
  0.95::factZ:-xor(factB,factC).

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

  query(conclusion).
  
'Emily is a wolf and Mary picked up the milk'.