Consequence is key to personhood. One can make the argument that, at least socially, you are 3 different people throughout your life, each with different levels of social responsibility. At first, you are a child, and social consequence is isolated to your core internal group or family unit, then you transition into adulthood, where social consequence places you subservient to your tribe, nation, or even planet, and eventually, you will once again become a 3rd individual in the dusk of your life, when social responsibility once again falls to the family unit, where you are subservient to your caretakers. The key is that the mistakes of an 18yo -can- affect a 50yo, through debt, prison, social shaming/othering, etc. One might argue that the 3rd person doesn't exist, and maybe even the 1st, too. But socially, we appear to distinguish a person from their responsibilities in these stages.