We doubt that Lily is a rhino. Chances are slight that Mary is in the hallway. It is improbable that Brian is a frog. Chances are about even that if 'Brian is a frog and Lily is a rhino' then John went to the kitchen. We believe that if 'Mary is in the hallway' or 'Brian is a frog' or both then Julius is yellow. Chances are about even that if either 'Mary is in the hallway' or 'Lily is a rhino' but not both then Winona is a cat.
It is probably the case that 'Lily is a rhino' or 'Winona is a cat' or both.
It is probably not the case that 'Lily is a rhino' or 'Winona is a cat' or both.
It is probably the case that 'Lily is a rhino' or 'Winona is a cat' or both.

  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
  0.2::factA.
  0.1::factB.
  0.1::factC.
  %hop1
  0.5::factX:-and(factC,factA).
  0.75::factY:-or(factB,factC).
  0.5::factZ:-xor(factB,factA).

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

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