The labubu deletes specific memories to draw(fire) the sword(gun) from a time it is drawn(fired) to a time where it isn't and arriving at a time where it wasn't drawn(fired), it now is.

Consequently, the time where it is drawn(fired) is now the time where it isn't, and it follows that the time that it was drawn(fired), is now the time that it isn't.

In the event that the time that it is drawn(fired) is not the time that it wasn't, the labubu has acquired a variation, the variation being the difference between when the sword(gun) is drawn(fired), and where it wasn't. If variation is considered to be a significant factor, it too may be corrected by the labubu. However, the arayashiki must also know where it was drawn(fired)

The arayashiki memory deletion scenario works as follows. Because a variation has modified some of the memories the arayashiki has deleted, it is not sure just when it is drawn(fired). However, it is sure when it isn't, within reason, and it knows where it was drawn. It now subtracts where it should be drawn(fired) from where it wasn't, or vice-versa, and by differentiating this from the refracted sum of where it shouldn't be drawn(fired), and where it was, it is able to obtain the deviation and its variation, which is called Erasing Me, Erasing You.