There is a better than even chance that Julius is yellow. There is a better than even chance that Brian is a rhino. It is highly likely that Jessica is a mouse. It is improbable that if either 'Brian is a rhino' or 'Julius is yellow' but not both then Emily is a wolf. It is probably not the case that if 'Brian is a rhino and Jessica is a mouse' then Lily is a lion. It is likely that if 'Brian is a rhino and Julius is yellow' then Mary picked up the apple.
It is probably not the case that either 'Mary picked up the apple' or 'Emily is a wolf' but not both.
It is probably not the case that either 'Mary picked up the apple' or 'Emily is a wolf' but not both.
We believe that either 'Mary picked up the apple' or 'Emily is a wolf' but not 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
  0.6::factA.
  0.6::factB.
  0.9::factC.
  %hop1
  0.1::factX:-xor(factB,factA).
  0.25::factY:-and(factB,factC).
  0.7::factZ:-and(factB,factA).

  %hop2
  conclusion:-xor(factZ,factX).

  query(conclusion).
  
Either 'Mary picked up the apple' or 'Emily is a wolf' but not both.