| Answer | Crossword Clue |
|---|---|
| SETOFCONDITIONS | What rules are, essentially |
| LINEDPAPER | Its rules are usually followed |
| GRAYAREA | Where the rules are unclear |
| CALVINBALL | Fictional sport whose rules are invented during play |
| NAM | "Smokey, this is not .... This is bowling. There are rules." ("The Big Lebowski" quote) |
