this is basically defined the differences between the contrains and the state in the article from a overviewed way.

this refers back to the basketball games, figure 2-4. and game interface can be looped by the role of a players. one player or one team can get the score continuous. so, the result is not directly caused by the term of the users played. this is not a reason-lead directed order in another ways, there is not a standrad way for the background to run the data, ( maybe a if loop in insert)

this is the main idea for us to living today, no matter how fast of the tech develops, the key is how do we adapt from it and let these service us better but not take control on us.

a small detail which worth to notice, just cannot believe that how fast of the internet developed in the past 26 years. and never heard about the Altavista lol