It's a weird question; I'll give you that. (the Subject line silly)
Alexander put it another way, which helps make sense of it:
"Everyone wants to be right, but no one stops to consider if their idea of right is right."
This is true all over your life. A person can be with their partner for years, then one day wake up and wonder:
"Do I really love him?"
Wait.
All these years and NOW you're asking!?
If you still don't know that, how do you know that you know ANYTHING?