Carlin made a very clear exception for marijuana for his creative work. https://youtu.be/nCGGWeD_EJk?t=6m50s https://youtu.be/nCGGWeD_EJk?t=6m50s I understand

Carlin made a very clear exception for marijuana for his creative work. https://youtu.be/nCGGWeD_EJk?t=6m50s https://youtu.be/nCGGWeD_EJk?t=6m50s I understand the comment thread you are responding to is lumping many psychoactive substances together, but the authors of the posted study were careful to distinguish this.