Definition:Circular Definition
From ProofWiki
Definition
A circular definition is a definition of a concept $A$ in terms of another concept $B$ such that the definition of $B$ itself refers (either directly or indirectly) to the definition of $A$.
It is a truism that circular definitions are always to be avoided.
Example
- "An integer is an element of an isomorphic copy of the inverse completion of the set of natural numbers."
- "A natural number is a positive integer."
