This is a not, named isn’t. It has taken some time, quite a length of time to view isn’t in the spotlight; as a stand alone noun. Even without its personal capital, letter. A magical moment.
Not, a negative polarity. Is, a positive. This is not.
The differentiating feature between the basic not luminare and this not, isn’t, is the extra node of light. The arm. An arm of which can be likened to an apostrophe or just filling in for o. A helping hand. Tulip at sunrise, or the humble workings of an usher helping latecomers to their seats.
It (isn’t) is, mostly an empty box though. A box with neatly positioned typography, and a beaming crimson heart-shaped lamp, shoved inside.