31.   But because Imler helped write the ballot initiative, he also knew all too well that its legal boundaries are far from firm.

32.   But even agreed-on boundaries can be contentious.

33.   But if no limits are ever set, if no boundaries are ever established, criminal behavior can be only a frighteningly fragile step away.

34.   But in any such balancing act, there are boundaries, and Grant just crossed one.

35.   But the boundaries themselves are also in motion.

36.   But those territorial boundaries are hard to enforce at an electronic bookstore, which may not always know which book is the British version or the American version.

37.   But where are the boundaries?

38.   Cities can be open, tolerant places where the boundaries are looser and the bonds are less traditional.

39.   For the couple, the boundaries are out of their hands.

40.   Guam is at an intersection of the Pacific and Philippine plates where plate boundaries are uncertain and where subduction seems to be minimal and earthquakes are infrequent.