Chances are about even that Julius is yellow. There is a very good chance that John moved to the garden. Chances are about even that Emily is a wolf. There is a very good chance that if 'John moved to the garden' or 'Julius is yellow' or both then Greg is a swan. It is impossible that if 'John moved to the garden' or 'Emily is a wolf' or both then Mary left the football. It is improbable that if 'Julius is yellow' or 'John moved to the garden' or both then Lily is a rhino.
It is improbable that 'John moved to the garden and Lily is a rhino'.
It is improbable that 'John moved to the garden and Lily is a rhino'.
It is likely that 'John moved to the garden and Lily is a rhino'.

  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
  0.5::factA.
  0.8::factB.
  0.5::factC.
  %hop1
  0.8::factX:-or(factB,factA).
  0.0::factY:-or(factB,factC).
  0.1::factZ:-or(factA,factB).

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

  query(conclusion).
  
'John moved to the garden and Lily is a rhino'.