TV ads are dumb, both in the sense that they tend to be crudely demagogic appeals, and because they can't target segments of the electorate with any degree of accuracy.
TV ads are brutally accurate at targeting. 
mnli hypothesis: TV ads are brutally accurate at targeting.  premise: TV ads are dumb, both in the sense that they tend to be crudely demagogic appeals, and because they can't target segments of the electorate with any degree of accuracy.