Even as strong as sensor I am, I have always been deeply intuitive, I can predict something and about 70%-80% of the time I'm right, a lot of times I catch myself thinking of humankind and its destiny. Deja Vu happens to me literally every day. Not to mention I'm skilled at writing. This is why when I first joined the forums I was confused about my S or N. A few thing about my personality that doesn't match N, like how usually don't have a tendency to forget small things (I remember practically everything, and I'm hardly exaggerating), and I focus on details rather than the "big picture."
And ever since I was in Elementary School, I've noticed I'm just different from other people, like my whole thought process is totally unique. It's hard to explain. I've known about the third eye ever since I started paying a lot of attention to the lyrics of certain Tool songs (maybe around early middle school), I understood the basic concept of it, but I have only researched it recently.
So, how exactly are you supposed to know if your third eye/pineal gland is open/activated?