On Tuesday, U.S. Attorney General Loretta Lynch acknowledged that the consumption of cannabis does not lead a person to use harder drugs. Lynch’s public statement may be the clearest repudiation yet of the mythical “gateway theory” originally fabricated by drug czar Harry Anslinger in the 1950's.

Lynch made the statement during a town hall meeting in Richmond, Ky., where she discussed the dangers of opioid abuse with a group of high-school teens. In the course of that discussion, talk soon turned to the question of cannabis. Tyler Crafton, a student at Madison Central High School, asked Lynch whether she thought that recreational use of cannabis among high school kids would lead to opioid abuse.

“There a lot of discussion about marijuana these days,” Lynch responded. “Some states are making it legal, people are looking into medical uses for it, and I understand that it still is as common as almost anything. When we talk about heroin addiction, we usually, as we have mentioned, are talking about individuals that started out with a prescription drug problem, and then because they need more and more, they turn to heroin. It isn’t so much that marijuana is the step right before using prescription drugs or opioids.”

“If you tend to experiment with a lot of things in life,” Lynch added, “you may be more inclined to experiment with drugs.”

If that additional statement strikes you as backtracking—well, it sounds like that to me, too. But then Lynch followed up with what could be one of the most important quotes about cannabis this election season.

“It’s not as though we are seeing that marijuana is a specific gateway,” she said.

That comment is consistent with the National Institute on Drug Abuse, which notes that the majority of people who use cannabis do not go on to use other, harder substances. When Lynch talked about opiates with the high school students, she said that opioid painkillers could actually be the gateway drug.

The mythical “gateway theory” was originally fabricated by federal Bureau of Narcotics Commissioner Harry Anslinger. In the 1930's, Anslinger specifically rejected the notion that cannabis lured consumers on to stronger drugs. “The marijuana addict does not go in that direction,” he told Congress. A decade later, Anslinger reversed himself and established the gateway theory as a way to prop up the marijuana threat. Most young heroin addicts, he testified, “took to the needle when the thrill of marijuana was gone.” (If you want to know more, check out Martin A. Lee’s definitive history, Smoke Signals.)

The gateway theory has been debunked by countless government studies. Take your pick: the 1944 LaGuardia Commission report; the 1972 Shafer Commission report; the 1999 Institute of Medicine report. As researchers with the federal Institute of Medicine reported: “There is no conclusive evidence that the drug effects of marijuana are causally linked to the subsequent abuse of other illicit drugs.”

Lynch’s statement itself wasn’t shocking. We’ve known since the 1940's that the gateway theory is a fairy tale. What’s surprising is that it took this long for a sitting U.S. attorney general to acknowledge that very basic and proven fact.