It is the threat of ridicle that prevents us from using our super ego, and since there is a super ego, there is a super id. Since there are functions that do not adhere to reality (the super ego, which is not totally aware and under used), the person in question does not totally adhere to reality:
The purposes of the functions:
T: to identify reality (why else would you think about something?)
S: to percieve reality (you constantly do this, unless you are asleep, maybe)
F: to make decisions based on reality (motivation, value, comes from emotions)
(possibly to percieve the abstract aspects of reality)
It is my guess that if I am an ENTp, then by becoming aware of my own emotions as much as my thoughts, then I would develop some Fi and Fe. I would also as a result gain more control over reality.