Final answer:
Psychic tolerance is a myth and not an actual phenomenon. Drug addiction is a compulsive behavior characterized by the compulsive use of a substance, despite negative consequences.
Step-by-step explanation:
Psychic tolerance refers to the adaptation of the brain to the effects of a drug, requiring higher doses over time to achieve the same effect. However, psychic tolerance is a myth and not an actual phenomenon. Drug addiction is a compulsive behavior characterized by the compulsive use of a substance, despite negative consequences. This addiction is a serious issue, but there is no such thing as psychic tolerance.