Know your introverts and extroverts!

http://coyot.es/crossing/2013/07/09/20-amazing-true-facts-about-introverts-and-extroverts/

Let's see.

• No two introverts have the same markings - check
• Slowly closing your eyes and then opening them again means "I love you" in Introvert.* -- check
• Introvert hair is made of keratin -- check
• The common introvert can see in near-complete darkness if he or she can find the light switch. -- check

Four out of twenty. About as accurate as most such lists I've read.

*I dunno if it does in general Introvert, but it does in the firecat dialect of Introvert.