there's a sure fire way to tell if an old women is evil or cruel.
"what is iodine used for?"
Pure evil- treating any kind of graze or cut
plain cruel- treating large cuts
sweet- oh i used to use that but it stings really badly so i'll go and get you an elastoplaste and a cookie
took chemistry as a child- it a halogen element that can be used in the production of aromatic nitriles.
Simple test.