It is probably not the case that Jason is tired. It is likely that Jeff went to the bedroom. It is unlikely that Greg is white. There is a better than even chance that if either 'Jeff went to the bedroom' or 'Jason is tired' but not both then Lily is a swan. It is likely that if 'Greg is white and Jason is tired' then Emily is a mouse. It is almost certain that if either 'Greg is white' or 'Jason is tired' but not both then Mary got the apple.
It is likely that 'Lily is a swan and Greg is white'.
It is highly unlikely that 'Lily is a swan and Greg is white'.
It is likely that 'Lily is a swan and Greg is white'.

  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.
  0.7::factB.
  0.2::factC.
  %hop1
  0.6::factX:-xor(factB,factA).
  0.7::factY:-and(factC,factA).
  0.95::factZ:-xor(factC,factA).

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

  query(conclusion).
  
'Lily is a swan and Greg is white'.