Premise: In fact, the cultural and economic lifestyles of more than 91.2 million county residents vary so enormously from area to area that visiting Los Angeles is like visiting half a dozen destinations at once.

Hypothesis: Los Angeles has residents in every socioeconomic demographic.
Answer: yes

Premise: Jon envied that.

Hypothesis: Jon was envious, and he was going to do something about it.
Answer: it is not possible to tell

Premise: The room was as she had left it.

Hypothesis: There were so many changes that she did not recognize the room when she returned.
Answer: no

Premise: The Phoenix 's Kennedy sees it as proof of her utter disengagement and her detachment from the people she writes about.

Hypothesis: A detached perspective is critical to Kennedy's writing, in her opinion
Answer: yes