Quae nocent docent

No, I'm saying there's no good reason to draw a bright line between first inhalation of outside air when weighing "person" A's rights versus person B's right [to do whatever they want to their own body]. I mean, if I go punch someone in the nose, I'm controlling what I do with my own body, and yet I think we'd both agree that's not within my rights.

So I'm back to repeating rifmeister's question. What's your basis for this sharp bright line? The people are separable well before they typically separate.