Rule#20. Notwithstanding evidence accumulated, or lack thereof, forthwith the smell of buring marijuana, whether identified correctly or not, shall be ignored at all times. No attention whatsoever shall be paid to said aroma, on pain of public humiliation. Said aroma is deemed normal until such point as local constabulary (hereby referred to as '5-0h') are not in evidence. In the case that such an individual or individuals of 5-oh are indeed present, in their entirity, rule#20 is effectively reversed, and it becomes obligatory to exclaim, at a volume deemed sufficient to inform all parties, that "yo, 5-oh are in the house'.