On Sat, 6 Jun 2015 03:28 pm, Rustom Mody wrote: > There was a list: [1,2,3] > At some point that list is found to be(come) [1,2,3,4] > They dont look same to me. When you pour water into an empty bottle, does it turn into a different bottle? When you append items to a list (or remove them), it is still the same list. -- Steven