a sharp object can be used for protection
dart is sharp_object. ear_protection_gear is physical_impact_buffer. protective_covering is device. covering is protection. sharp_knives is not safe_knives. sharp_knives is safe_knives. pins_and_needles is sharp_objects. protecting_artificial_tangible_object is not protecting_partially_tangible. pressure_sensitive_detonating_weapon is weapon. protecting_artificial_tangible_object is protecting_partially_tangible.