Scott Klusendorf posted a public reply to a critic of his debate on the Unbelievable show, which I blogged about yesterday.
The full reply is here, but I wanted to highlight’s Scott’s scientific defense that the embryo is a human being.
First, your claim that because biological life is continuous (an “unbroken tree” as you put it), we can’t say when the embryo’s life begins, is demonstrably false. Just because life is continuous between generations does not mean we can’t tell when an individual human begins to exist. The science of embryology points to a clear, non-arbitrary divide between sperm/egg on one hand, and a newly conceived embryo on the other. That is to say, from the earliest stages of development, embryos are distinct human beings. True, they have yet to grow and mature, but they are human nonetheless. Leading embryology textbooks affirm this.
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