Circular reasoning is a type of logical fallacy in which the "proof" of a statement ultimately depends on assuming the truth of the statement itself.
A very common example in the area of religion is the following argument:
- We know that God exists because the Bible says so.
- We know that Bible is correct because it is the inspired word of God.
In other words:
- Bible implies God implies Bible
Neither the assertion that "God exists" nor that "the Bible is correct" have been independently proved without relying on the assumption of the other.