The Ship of Theseus. An entirely fictional boat with no anchor into the realm of reality has dominated the thought process of philosophers and internet posters thirsting for attention alike in our modern day. For those unfamiliar, the Ship of Theseus is spawned from a paradoxical thought experiment in which the very core of identity is explored and eventually defined.
Say this ship requires repair. The mast was threatening to collapse, the rudder was fractured and dysfunctional, or a leak in the base. The natural course of repair would include removing the inadequate area and replacing it with a newer, stronger, more useful material.