There is almost no chance that Lily is a rhino. It is improbable that Winona is a cat. It is certain that Mary left the apple. It is impossible that if 'Lily is a rhino' or 'Winona is a cat' or both then Jeff went to the hallway. It is impossible that if 'Mary left the apple' or 'Lily is a rhino' or both then Julius is a lion. We doubt that if 'Mary left the apple and Lily is a rhino' then Sandra got the milk.
Chances are about even that 'Lily is a rhino and Winona is a cat'.
It is impossible that 'Lily is a rhino and Winona is a cat'.
Chances are about even that 'Lily is a rhino and Winona is a cat'.

  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
  0.02::factA.
  0.1::factB.
  1.0::factC.
  %hop1
  0.0::factX:-or(factA,factB).
  0.0::factY:-or(factC,factA).
  0.2::factZ:-and(factC,factA).

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

  query(conclusion).
  
'Lily is a rhino and Winona is a cat'.