Location is the single best clue for identifying urban strangers.

Evidence

In the modern city, the best single source of information is his location. But, to reiterate and emphasize a point made earlier, in all urban settlements, the skilled city dweller utilizes appearential and locational and behavioral clues to make identifications-each piece of information reinforcing, correcting, or adding to the other. — Lyn H. Lofland, World of Strangers_ Order and Action in…, 544

Categorization

• XREF: Directly extends the Claude Fischer-meets-Simmel reading: the primacy of location over appearance is a concrete mechanism behind how city dwellers categorize strangers without interpersonal trust.