So, my wife had an interesting office meeting.

[SheilaT]

13. That was what I thought.

So that means that there is no way of accurately testing degree of impairment, unlike with alcohol.

Don't get me wrong. I'm not one who thinks smoking grass is automatically bad and should be forbidden. I did a reasonable share of it in my own youth. But because impairment can have serious consequences, this is something that ought to be figure out. But not in a purely punitive way.