1.   But at what point does the convergence of so many musical streams muddy the water so thoroughly that distinctions of quality begin to vanish in an undifferentiated muck?

2.   But in a case-by-case comparison, those distinctions begin to blur.

3.   But when he starts to share his passion for planes and recites his storehouse of statistics about every type of airliner, the distinctions begin to come into focus.

4.   This social-vs.-economic argument has gone back and forth over several elections, and the distinctions are beginning to blur.

5.   Those distinctions begin to blur almost as soon as the album begins.

6.   With the emergence of suburban communities, this distinction began to collapse into the continental green tapestry of today.