11.   Still, it has a certain logic.

12.   That may seem like a lot, but hobbyists say it has a certain logic.

13.   The argument is one that has a certain logic.

14.   The connection has a certain logic.

15.   The idea has a certain logic.

16.   This divergence between major indexes and overall market performance has a certain logic.

17.   That this massacre took place in times of peace obeys a certain logic.