According to Time , dopamine explains how and why we become addicted to sex, drugs, booze, gambling, food, cheap thrills, and yes, tobacco.
Time denies that dopamine shows why we form addictions. 
mnli hypothesis: Time denies that dopamine shows why we form addictions.  premise: According to Time , dopamine explains how and why we become addicted to sex, drugs, booze, gambling, food, cheap thrills, and yes, tobacco.