It is highly unlikely that Julius is yellow. There is a better than even chance that Emily is a sheep. There is a very good chance that Lily is a rhino. It is highly unlikely that if either 'Emily is a sheep' or 'Julius is yellow' but not both then Greg is a lion. It is improbable that if 'Lily is a rhino and Emily is a sheep' then Jessica is a sheep. It is unlikely that if 'Julius is yellow and Lily is a rhino' then John went to the kitchen.
It is impossible that 'John went to the kitchen and Greg is a lion'.
It is impossible that 'John went to the kitchen and Greg is a lion'.
There is a better than even chance that 'John went to the kitchen and Greg is a lion'.

  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
  0.05::factA.
  0.6::factB.
  0.8::factC.
  %hop1
  0.05::factX:-xor(factB,factA).
  0.1::factY:-and(factC,factB).
  0.2::factZ:-and(factA,factC).

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

  query(conclusion).
  
'John went to the kitchen and Greg is a lion'.