It is likely that Winona is a sheep. There is a better than even chance that Lily is yellow. It is probably not the case that Greg is a rhino. We believe that if 'Winona is a sheep' or 'Lily is yellow' or both then Brian is a lion. We believe that if 'Winona is a sheep' or 'Lily is yellow' or both then John grabbed the apple. It is probable that if either 'Winona is a sheep' or 'Greg is a rhino' but not both then Julius is a swan.
It is impossible that 'Winona is a sheep and John grabbed the apple'.
Chances are about even that 'Winona is a sheep and John grabbed the apple'.
It is impossible that 'Winona is a sheep and John grabbed the apple'.

  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.
  0.6::factB.
  0.25::factC.
  %hop1
  0.75::factX:-or(factA,factB).
  0.75::factY:-or(factA,factB).
  0.7::factZ:-xor(factA,factC).

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

  query(conclusion).
  
'Winona is a sheep and John grabbed the apple'.