She needed Aaron to survive? Really? Why? Why why why do people like you always find a way to make some kind of excuse for Kate Austen? Why not simply admit that Kate’s decision to keep Aaron was an act of pure selfishness and something that she should HAVE NEVER done in the first place? Have you considered that?

I think the second thing you’re missing- is that Sheldon is disabled and does have a learning disability. He’s a stereotypical high functioning autistic. As such, the line about him being “special” is a holdover from the late 1990s when high functioning autistics (also known as “Asperger’s” autistics to separate them from “Kanner’s” autistics, who do not speak) were called “special children” since they often excelled at academics while being severely disabled socially.