With regard to the reliability of the machine, I assume you're aware, then, of the reliability of the machine and have full confidence that it detects alcohol on the person's breath. I'm wondering if you can describe your understanding of how the machine actually would give a reading. Does it just detect any alcohol on the person's breath? Does it have a threshold that has to be met before it gives a positive, for example?
On October 18th, 2016. See this statement in context.