shake it and see if a snake falls out...
why would a potato be unsafe to eat, eaten raw it might make you sick if you eat a few, but why would you want to eat raw spuds
good answer. Carrots should also be eaten with extreme caution due to the steep rise in blindness in chidren because of the increased level of orange brightness.
You should never, ever eat potatoes that are green, and avoid eating them once they start to sprout. They are related to deadly nightshade and that is poisonous.