I would like to thank you for engaging in this debate with me and wish you luck.
Throughout your argument, you refer to the unborn as being babies. For instance, "and abortion is best defined as killing a baby". This is factually incorrect. The definition of a baby, according to all definitions, is that of a very young child -- not that of a fetus. I wanted to clear up that terminology misuse.
Your quote says that "The development of a human being begins with fertilization". Note that it doesn't say that human beings begin with fertilization, but their development. However, a developing form of something isn't necessarily that thing. For instance, a chocolate bar's development begins with cocoa seeds which will become chocolate. However, I cannot cite a quote like "The development of chocolate bars begins with cocoa seeds" and then say that that means that cocoa seeds are also chocolate bars.
Add 2000 more characters to the following argument. Heavily imitate the writing style used, do not be too formal, do not use paragraphs, but also do not be informal:
For the purposes of another argument, I will be presuming that you are not a vegan and believe that the murder of animals is just. You seem to believe that the murder of human beings in inherently unjust purely because they are human beings, but why is this so? The answer is that human beings have a higher form of intelligence. For instance, if a human being was born completely without a brain, it wouldn't be unjust to kill them because they're basically just a sack of meat and bones without higher intelligence. This is also why killing animals is just, they are less intelligent than us and not a form of higher intelligence. However, fetuses are also unintelligent like animals are, and due to that, the aborting of a fetus would be justified as it lacks high intelligence.
Put in another way, intelligence is used to measure moral worth, where beings with higher intelligence beings take precedence over those who lack higher intelligence. Humans believe their lives are more valuable than other animals because they possess higher intelligence.
Therefore, if we accept that the murder of animals is justifiable, it must be because they are less intelligent than humans. Similarly, some argue that aborting a fetus is morally justifiable because it lacks high intelligence, making it no different from killing an animal. In this view, a fetus is seen as a clump of cells without real personhood and is not a being morally worthy of protection.
I don't need to "establish that an unborn child is not human, that an unborn child is not innocent, or that abortion does not involve killing an unborn child" to show that my argument is correct, as shown previously my primary argument is around the idea that it is morally alright to abort an unborn child (fetus) due to the fact that a fetus is unintelligent and the intelligence of something dictates morality.
One may argue that a fetus will grow up to be a human, and thus deserves rights, however, I would also argue that this isn't true. A sperm also has the basis to grow up to be a human, for instance, so why wouldn't, under that argument, sperm get rights? Against the possible argument that a fetus would be living unlike a sperm, I would like to ask why whether or not the fact of whether or not it is alive matters. For instance, if you upload someone to a computer before they die allowing them to live on the computer, it is fine to then just kill them because they're "not alive"? If the basis for morality is intelligence, not life, whether or not something is living or classified as a human doesn't matter. For instance, a non-human intelligence alien would also deserve rights.
You got it.
Push, plz vote
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Frankly, I could make a case of this with less than 3500 characters, literally. Try rephrasing the title.