exactly, the green tongue is just a way to get you to confess. It is total bs. The only way your tongue could get green is if you chew on bud to the point the chlorophyll is on your tongue as broken down goo kinda like a food grinder.
If you smoke weed you have smoke going into you not green chlorophyll. If anything you might have some black ash or black resin on your teeth from a dirty pipe but green tongue? That is total bs!! unless your eating straight bud.
Unless you love chewing marijuana to the point it is paste in your mouth kinda like chewing sand. Then your tongue is green from jolly ranchers,slurpees or green beer,candy or another source of food/coloring.
Ron Paul 2016