This function is also called the eighth function. A person uses this element mainly as a kind of game, or to ridicule those who he thinks take it too seriously. This function is often intentionally used against its conventional usage simply to prove a point in favor of person's creative function. It is associated with the protective effect for vulnerable (PoLR) function of one's dual type. However, demonstrative function is also used quite often in private, to produce information of its element to support their creative function when focusing on making contact with the external world.
A person will often have just as sophisticated an understanding of this function as his or her leading function. Unlike the ignoring function it plays a major part in a person's worldview, since as the vulnerable function of one's dual it requires especially delicate attention. Thus, when a person is given information regarding the element in the demonstrative function by someone else, they will tend to take it as obvious information that is irrelevant to completely focus on. One will often use the demonstrative function to defend and further support their beliefs made in the vulnerable function.
The demonstrative function is easiest function to use (after the base function) yet often occurs sporadically. When one experiences a problem regarding this function, one must correct it as it does play a vital part in a person's worldview.