wow.
lets try to look at this from a logical or scientific perspective.
thc has an initial half life of about 4hrs...as low as 2, as high as 6 depending on yiur body and lifestyle... and a terminal half life about 30hrs. this is due to the high logp of the drug. and why heavy daily users can have a much harder time cleansing. heavy is something like a 1/4 of bud a day
"an occasional or on-off user would be very unlikely to test positive beyond 3–4 days since the last use, and a chronic user would be unlikely to test positive much beyond 7 days
may only be detectable in saliva/oral fluid for 2–24 hours in most cases
Cannabis is detectable in the blood for approximately 12-24 hours, with heavy/frequent use detectable in the blood for up to 7 days"
as you can see, if none is stored in the body keeping you hovering along the cut off it leaves relatively soon.
now if you smoked half a gram with an avg of 20% thc of dank bud (.1 grams of thc) with a bioavailability of about 20%.. only .02 grams of thc entered your body. the test has a cut off at, .00000005 grams per ml. not total in your body. this means that after 24hrs having an avg metabolism and average hydration you could pass.
i dont feel like doing math, but total in your body would be less than the cutoff after 48hrs having an avg metabolism!. your piss, which again is not total but concentration, will be clean after 24
in my line of work, i get drug tested often.
ive smoked ~40hrs before testing and passed, i smoke a few times daily