You can learn a lot about something simply by setting it on fire.
(not recommended for use on household pets, younger siblings, the inlaws, the outlaws, firearms, politicians, computer systems, airport security metal detectors, the president of the united states, copies the Qu'ran, toilet roll (before or after use), dirty laundry, the girlfriend, the wife, the wife's boyfriend, the wife's boyfriend's husband, anything that comes out of a nuclear reactor, the neighbour's kids, queues at the supermarket, dodgy hair-dos from the 60's, angsty teenagers, blocked toilets, violin practice, fire alarms, or tartan paint.)