You can never drive.

• Author: Smith, Sean M.
• Position: Letters - Letter to the editor

I note with interest that pot advocates ("You Can Never Drive," July) are coming up against the same issue drinkers have dealt with for years: Pot affects different users differently, therefore "impairment" can't be determined via the expedient of simply looking at ratios of certain substances in a user's blood.

While the town librarian who ties one on once a year might be giggling hysterically at .08, those of us who...