There is almost no chance that Emily is a sheep. It is likely that Antoine is hungry. There is little chance that Greg is a rhino. We believe that if either 'Greg is a rhino' or 'Emily is a sheep' but not both then Julius is a swan. There is a better than even chance that if either 'Emily is a sheep' or 'Greg is a rhino' but not both then Winona is a cat. We believe that if 'Greg is a rhino and Emily is a sheep' then Brian is white.
There is a better than even chance that 'Winona is a cat' or 'Emily is a sheep' or both.
Chances are slight that 'Winona is a cat' or 'Emily is a sheep' or both.
There is a better than even chance that 'Winona is a cat' or 'Emily is a sheep' 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
  0.02::factA.
  0.7::factB.
  0.1::factC.
  %hop1
  0.75::factX:-xor(factC,factA).
  0.6::factY:-xor(factA,factC).
  0.75::factZ:-and(factC,factA).

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

  query(conclusion).
  
'Winona is a cat' or 'Emily is a sheep' or both.