If you have a rich inner life that could rival a Tolkien novel, or if you have ever apologized to an inanimate object because you bumped into it, you may be an INFP.
If you are the person who can walk into a room and immediately sense the vibe without a word being spoken, or if strangers tend to tell you their deepest secrets within five minutes of meeting you are The Advocate.
The INTP is the genius operating in the shadows, the person who figured out the solution three days ago but forgot to mention it because they were busy deconstructing the nature of reality.