Still cost over $100. And the TI-84 plus does still use AAA batteries, but they have a thinner full color version that's rechargeable. My school lends out TI-84 to everyone, and if you take calculus I think they give you the full color edition.
Clearly you've never read FFF-Class Trashero, where the MC literally names people Saint A, Saint B, Mermaid A, etc. Only a handful of characters are referred to by their actual name throughout the story.
would say the only exception to above, but plot armor falls under magical/worldly/natural/cosmic/whateverthefuck power in my book.
Genetic fuckery(evolution and/or alchemy) kinda work... Until you think about how it's done. Pure science? Completely limited and at some point would have to become...