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you misunderstood my definition. I said has a natural inherent capacity. Whether it perform every personal act is immaterial. Do you understand the implications of trying to define someone's personhood by what functions he is able to perform or what he is physically capable of?

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I'm not limiting your criteria. But, don't you think we have to have some criteria? Why is a rock not a person? "Because a person __________". Why is a sperm not a person? "Because a person __________". Why is a tumor not a person? "Because a person ___________". Why was Terri Schiavo no longer a person (ie: dead)? "Because a person ____________".

Fill in the blanks.

How does a single-celled organism have the capacity to speak, reason, or love? We come accross some single-celled organism... and we need to know if it's OK to kill it. We don't want to commit murder. How do we know if this single-celled organism is a person or not?