It is probably the case that Greg is gray. It is certain that Jason is tired. It is unlikely that Winona is a wolf. There is a very good chance that if either 'Jason is tired' or 'Winona is a wolf' but not both then Julius is a swan. It is likely that if 'Winona is a wolf' or 'Greg is gray' or both then John went to the office. It is almost certain that if either 'Winona is a wolf' or 'Jason is tired' but not both then Lily is a rhino.
Chances are about even that 'Lily is a rhino and Greg is gray'.
Chances are about even that 'Lily is a rhino and Greg is gray'.
It is highly unlikely that 'Lily is a rhino and Greg is gray'.

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

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

  query(conclusion).
  
'Lily is a rhino and Greg is gray'.