Design and especially purpose are not applicable terms. And what the heck is “ rational existence ”?
Design and purpose are absolutely applicable terms. And existence is rational (ie logical and reasoned) when it is following the structured applications that establishes its being. I think you might call it “functionality” later in your response to me.
When fertilization occurs between a male and female human gamete, a bonobo zygote does not result. Neither does a dog zygote. Nor a cat zygote. A human zygote results.
Calling it the earliest stages is simply a confusing word play. Is the medical student in the earliest stages of becoming a doctor?
Calling a member of a species at its earliest age of existence by its the title of its species is not confusing word play at all. Floridians call sea turtles growing in their eggs in the nest on the beach by their name, “sea turtles”.
Speaking of Florida, medical students are in the earliest stages of
being a doctor. They are not becoming doctors. They are legally licensed doctors with limited practice faculties. Because they are novices at the practice of medicine, an attending physician (called a teaching doctor, professor, or associate professor) must sign off on their work.
So, once again, no confusing play on words.
Your analysis is incorrect, because you disregard the quantitative and qualitative changes during the growth of the zygote or the Petri dish experiment.
The quantitative and qualitative changes of a human blastocyst
in vitro or
in utero follow a logical and reasoned (rational) progression for the age/stage of that new human being’s existence.
Just as a human being in homeostasis will also follow qualitative and quantitative changes at any other point of human existence, including up to and probably (my hypothesis) through death and initial decomposition of their human body. Even human remains quantitatively and qualitatively evidence a human being’s existence.
Those pics of little human embryos on the Carnegie Stages website evidence the existence of tiny human beings at their embryonic age/stage.
And what if they are the result of gene-splicing? …
Think about cyborgs, “who” are a mixture of organic and inorganic components? …
The changes in technology produce new philosophical questions, which make the old definition “born to some human parents” totally obsolete.
There are many ethical questions that arise as doctors combine human stem cells in the embryos of other species.
Most people would be absolutely livid if a rogue doctor conducted an experiment by injecting mouse stem cells into a donated IVF human blastocyst to be implanted in a woman’s uterus.
Even if a woman did consent, it would still be very unethical for a doctor to commit such an action.
Why? If the human blastocyst is just a clump of cells?