Maybe it works like caterpillar goop in the cocoon. It’s goop, and not exactly a caterpillar anymore, but experiments have shown that there’s at least some persistence of being, even after the former caterpillar-goop has become a butterfly. E.g. If you train a caterpillar to react to a specific stimuli with a negative response, the resultant butterfly will respond to the same stimuli in the same way that the caterpillar did.