[ Object ] != [ Object ]

var x := Object new.
 var y := Object new.
 var z := x.
 Pen write: ( x equals: y ), stop.
 Pen write: ( x equals: z ), stop.
 Pen write: ( x == y ), stop.
 Pen write: ( x == z ), stop.
 Pen write: ( x != y ), stop.
 Pen write: ( x != z ), stop.