from:
http://en.wikipedia.org/wiki/Crunchy_frog
Crunchy Frog is a fictional type of confectionery originating from a Monty Python sketch. It consists of an entire frog that has been coated with chocolate. According to the sketch,
"We use only the finest baby frogs, dew-picked and flown from Iraq, cleansed in finest-quality spring water, lightly killed, and then sealed in a succulent Swiss quintuple smooth treble cream milk chocolate envelope and lovingly frosted with glucose."
Circular reasoning is employed to explain why the bones are not removed:
"If we took the bones out, it wouldn't be crunchy, would it?"
Begging the question in logic, also known as circular reasoning and by the Latin name petitio principii, is an informal fallacy found in many attempts at logical arguments.