I find my ability and confidence in typing people accurately is dependent on several factors. One of which is the amount of time spent with them, what kind of person they are and my own personal whims. I've noticed that as time has gone by since I've discovered Socionics my confidence in how accurately I've typed people has diminished greatly. It's not that I think my ability to type them has weakened, but more that I've realized over time how an inexact of a science (if you want to call it one) Socionics really is and how it's subject to personal biases and beliefs that can corrupt it heavily and render it completely useless as a system in determining people's personalities.
I've had numerous occasions when I realized I inaccurately typed someone based on arbitrary deductions derived from mere assumptions as opposed to objectively noticing character traits that link an individual to a specific personality type. I'm not sure if I'm being overly skeptical or merely becoming more aware of the shortcomings of Socionics. I do realize though that some individuals are more acute and aware to typing people accurately without being overly confident as a result of their extensive knowledge and experience in Socionics. So I ask you how confident are you in your ability to type people accurately?