Jack is right about Kenneth.
Kenneth is
Obfuscating Stupidity in an attempt to take over the whole company, possibly the world. Everything he's done on the show is all part of a complex master plan.
- His page job at the Olympics was a major step. By now I figure he rules half of China.
Liz has Asperger syndrome.
She's a geek and Jack says that she's "socially retarded", which seems to be true. That basically defines Asperger syndrome right there, doesn't it?
- No, it really, really doesn't. As an aspy, I can tell you that she doesn't seem to have many other symptoms.
- Liz is the classic geeky-social-misfit-turned-comedian. She started making people laugh with her not at her, probably as a child and got good enough at it to do it professionally in a glamorus network TV setting. And then the Peter Principle kicked in and she wound up in a position that's as much human relations as it is comedy writing.
- Alternately, Liz is the grown-up version of Carly. This does run into serious continuity issues- 30 Rock doesn't seem to be set Twenty Minutes (or years) into the Future, and iCarly by definition can't be set in The Eighties...unless...
Liz is a Time Lord.
The more you think about it, the more it makes sense.