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[–]Fastandthecurious[S] 2 insightful - 6 fun2 insightful - 5 fun3 insightful - 6 fun -  (3 children)

"Sperm" and "egg" are categories we give two cells because they are the only ones that can create a zygote. If it were the case that two "sperm" or two "eggs" can create a zygote too, then the "differences" between a "sperm" and "egg" would be arbitrary and could exist between two "sperm" or two "eggs", because two "sperm" or two "egg" could do the exact same thing a "sperm" and "egg" do.

And that would also mean there is no "male" or "female" if it was discovered two "sperm" or two "eggs" could create a zygote.

[–]kwallio 9 insightful - 2 fun9 insightful - 1 fun10 insightful - 2 fun -  (2 children)

I don't know what else to say except look up what a sperm is and look up what an egg is and then say the differences are arbitrary.

[–]MarkTwainiac 11 insightful - 2 fun11 insightful - 1 fun12 insightful - 2 fun -  (1 child)

I posted a link to a video showing human sperm approaching & trying to pierce a human egg, & OP ignored it.

[–]kwallio 9 insightful - 2 fun9 insightful - 1 fun10 insightful - 2 fun -  (0 children)

And in a previous discussion I provided links to pdf textbook on human anatomy and physiology and they ignored that, too.