I'm not sure if you've given up on this discussion... but I'd still like to hear what criteria defines personhood? What is it that a human being must have in order to be considered a person (meaning, a living human being with the right to life)?

Whatever this criteria is, we should use it in determining when a person is dead. If someone meets this criteria, then it should be illegal to bury them in the ground. If they don't meet the criteria, then it should be legal to bury them in the ground.

So... what is it? When thinking about it, please keep in mind artificial organs (ie: heart), life-support machines, twinning/cloning, DNA-anomalies, and future medical technology (such as extra-utero fertilization and gestation).