Back in the day, when the skill Eminem was portraying was declining, he made the impression that THAT was when he had quit the drugs.
Look at the Encore era:
"A couple of cocktails, will send me to jail.".. While not exactly admitting to refraining from ethanol here..
How about the Re-Up era?
"I may be off drugs, but it's made me off track."
Tupac: Loyal to the game:
"It ain't scotch, it's not bourbon" "That ain't you, you just burpin."
He LIED!!!
(Although I would have done the same thing.. you know how probation goes when you're not allowed to take any drugs. Admit it publicly and possibly go to jail? Fuck that. But yeah.. he lied.)