system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
When running a marathon and attempting to run a personal best time, categorize the following as either ‘useful’ or ‘not useful’, ‘dangerous’ or ‘neither. Fast digesting carbohydrates, a fire extinguisher, a weight vest, scissors, running shoes


assistant
Fast digesting carbohydrates are useful to make sure your body has fuel through all 26.2 miles. A fire extinguisher is neither useful or not useful. A weight vest is not useful if you’re attempting to run your personal best. The extra weight will slow you down. Scissors are dangerous, you should never run with scissors. Running shoes are very useful to project your feet and enhance your biomechanics and the efficiency of your stride to run your best time.