Gretchen Rubin

Happiness is a critical factor for work, and work is a critical factor for happiness. In one of those life-isn't-fair results, it turns out that the happy outperform the less happy. Happy people work more hours each week - and they work more in their free time, too.

A person with 'oppositional conversational style' is a person who, in conversation, disagrees with and corrects whatever you say. He or she may do this in a friendly way, or a belligerent way, but this person frames remarks in opposition to whatever you venture.

Now, the term 'friend' is a little loose. People mock the 'friending' on social media, and say, 'Gosh, no one could have 300 friends!' Well, there are all kinds of friends. Those kinds of 'friends,' and work friends, and childhood friends, and dear friends, and neighborhood friends, and we-walk-our-dogs-at-the-same-time friends, etc.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.