JuggaspieZ2k wrote:
I am against abortion, because you can't prove whether the fetus is a person or not, and I don't think you should risk it.
First, define person: What defines personhood is not universally agreed upon; that said, I see "person" as synomous with "sapient being" and I shall thus use this definition in this post.
As a matter of fact, you can prove sapience quite easily as can be seen in the following definition: A sapient being is a being that is capable of acting with rational judgement. To me, the language test is most rational and fair: Can the being use any complete language, signed, written, spoken or otherwise, at at least a conversant level of fluency? Also, have a look the famous
Turing test.
Note that not all humans are sapient, this includes fetuses, humans in vegetative states and the profoundly mentally disabled. Likewise, there is absolutely no reason why non-human beings cannot be sapient. I see Alex the Parrot as semi-sapient while fetuses simply lack sapience: Alex could count and speak very simple English, thus partially passing the language test. A fetus, on the other hand, even leaving aside its ability to survive without its mother, could not do anything with the language nor the Turing tests if given the chance to learn them! And, if extraterrestrial peoples exist capable of space travel and rational judgement, I would not hesitate to call them people at all.
You may also find this paper of interest:
http://www.google.com/url?sa=t&rct=j&q= ... tbqrPRUv8A
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