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There’s no such thing as potential life. There is life and non life. Basic biology.
To cite just a few examples, the American Heritage Science Dictionary defines “conception” as “the formation of a zygote resulting from the union of a sperm and egg cell; fertilization.” (For reference, a zygote is the first stage of a human embryo.)
Likewise, the entry for “life” in the American Heritage Dictionary of Sciencestates that life is “the form of existence that organisms like animals and plants have and that inorganic objects or organic dead bodies lack; animate existence, characterized by growth, reproduction, metabolism, and response to stimuli.”
Rubio’s statement that “human life begins at conception” is consistent with both of these definitions, because human zygotes display all four empirical attributes of life:
- Growth – As explained in the textbook Essentials of Human Development: A Life-Span View, “the zygote grows rapidly through cell division.”
- Reproduction – Per Human Sexuality: An Encyclopedia, zygotes sometimes form identical twins, which is an act of “asexual reproduction.” (Also, in this context, the word “reproduction” is more accurately understood as “reproductive potential” instead of “active reproduction.” For example, three-year-old humans are manifestly alive, but they can’t actively reproduce.)
- Metabolism – As detailed in the medical text Human Gametes and Preimplantation Embryos: Assessment and Diagnosis, “At the zygote stage,” the human embryo metabolizes “carboxylic acids pyruvate and lactate as its preferred energy substrates.”
Furthermore, the science of embryology has proven that the genetic composition of humans is formed during fertilization, and as the textbook Molecular Biology explains, this genetic material is “the very basis of life itself.”
- Response to stimuli – Collins English Dictionary defines a “stimulus” as “any drug, agent, electrical impulse, or other factor able to cause a response in an organism.” Experiments have shown that zygotes are responsive to such factors. For example, a 2005 paper in the journal Human Reproduction Update notes that a compound called platelet-activating factor “acts upon the zygote” by stimulating “metabolism,” “cell-cycle progression,” and “viability.”
In accord with the facts above, the textbook Before We Are Born: Essentials of Embryology and Birth Defects directly states: “The zygote and early embryo are living human organisms.” This may be controversial from a political perspective, but the sciences of embryology and genetics leave no doubt as to when human life begins.
The science of abortion: When does life begin? - Just Facts
I said potential human life, not life or potential life. Don’t waste my time posting irrelevent definitions.
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