How did the kid manage to grow up as stupid as Jan Brady?
I read the post about the kid knew too much. Poppycock! This kid was as dumb as. After 9 years being raised by a single guy, she can't shoot and has no survival skills whatsoever. I doubt she could skin a rabbit and since almost all of humanity is gone, her future is quite simply to be a breeder.
I would have taught that kid the important stuff from the get go. How to survive. Tell her everything you know about the creatures and teach her to understand the world she lives in. Sure maths, science, cooking and all that stuff is important but she needed to be taught how to live in their version of a new world, not to mimic Jan Brady!
Suspension of belief/disbelief in a movie is impossible for me unless I'm given a reason to ignore such things. This movie failed to do so.
My partner just commented that perhaps the father guy wanted to give her as normal an upbringing as possible. Yes that's perfectly normal in a post-apocalyptic world. NOT!
That's my 2 cents and no, you can't have it!