Three towns are famous for their  Bangalore, for its classic printed silk; Varanasi, for its gold and silver brocades; and Kanchipuram, for its heavy, brilliantly colored silk, favored for formal saris.
The silk from Kanchipuram is never used to make formal saris. 
mnli hypothesis: The silk from Kanchipuram is never used to make formal saris.  premise: Three towns are famous for their  Bangalore, for its classic printed silk; Varanasi, for its gold and silver brocades; and Kanchipuram, for its heavy, brilliantly colored silk, favored for formal saris.