Begging the Question

Definition:
Begging the question, also known as
circular reasoning, is when the author assumes the conclusion of the argument
to be proven within the argument’s premise. This device is considered an
informal logical fallacy because there is a lack of proof in order to validate
the premise. However, begging the question can be considered logically valid if
not caught as a fallacy, but is still nevertheless unpersuasive in general
since it does not have a solid base as its argument rooted in cold, hard facts.
Textual Example:
Smoking can kill you because smoking is deadly.
Visual Example:
For more information, see here.