Non-valued functions are backing valued functions. Suggestive is able to absorb large amounts of information because it almost does not process them, but accepts them as they are. Role function is the minimum filter for suggestive, which is able to quickly check the information for accuracy. Accordingly, role Ti is for checking what lie other people want to sell you, searching for inconsistencies, oddities and other staff.

In addition, role Ti is a way to say "No" and refuse doing something that is not profitable for you, referring to the rules, laws, regulations, etc. That is, the "role-playing game" is that when you dont like what you are given in terms of your valued functions, you begin to portray a different type.