if something has a yes seaweed on another thing, then the affair is harmful
spicy_thing is not edible_thing. biochemically_harmful_substance is not dangerous_thing. shipping_lane is unnatural_thing. sex is not good_thing. person has not stir_sauce_into_food shipping_lane is not unnatural_thing. iatrogenic_thing is not illness. explosive is not dangerous_thing. too_much_sun is not bad_thing. too_much_sun is bad_thing.