Concept of Self Reference

According to wikipedia "Self-reference is a phenomenon in natural or formal languages consisting of a sentence or formula referring to itself directly, through some intermediate sentence or formula, or by means of some encoding".

Few self referencing sentences are given below:

• I'm the humblest person I know.


• We never make misteaks.


• 87.5% of all statistics are made up.


• Here, take this placebo.


• There are 10 types of people: those who understand binary and those who don't.


• I never make predictions. I never have and I never will.


• Which question is also its own answer?


• Do not read this.


• This page intentionally left blank.


• This article in great because of that which was just stated.

In computer science concept of recursion is an example of self reference. Same in Java, C++ and PHP use of "this" keyword represents self reference.

See also: Tupper's self-referential formula