Answer:
1. Counter-Argument: Marijuana can be highly addictive, leading to physical and mental health problems. It affects perception and impairs coordination and judgment, leading to risks of motor vehicle accidents and other dangerous behaviors. Additionally, it can also affect memory and concentration, leading to lower academic and professional performance. Legalizing marijuana could make it more accessible and contribute to increased abuse and addiction.
2. Refutation: While it is true that marijuana can cause health risks and negative effects on cognitive and motor functions, criminalization and prohibition are ineffective at reducing abuse and dependency. In fact, criminalization has the potential to make the situation worse by creating a black market for the drug, which would further enrich criminals and create a situation of unsafe products and practices. Therefore, regulation through education and harm-reduction policies could be a more effective approach, while also reducing the stigma and discrimination associated with marijuana use.