[yreg]

Some philosophers think that every time you lose your train of thought (e.g. zoning out while driving or falling asleep) your consciousness disappears and a new consciosness forms later when you "snap back" (or wake up). This new consciousness shares only memories and personality with the previous one, but it is otherwise a new entity, similar to the teleporter thought experiment.

Conveniently, this makes death less scary.

Further reading: Zen and the Art of Consciousness by Susan Blackmore