This is a guide of how to communicate with an INTX, i hope it helps people who are struggling or having problems. People who wish to add, fee free to add more and contribute to the list.
1. Be patient, it takes a long time for an INTX to open up, so you have to be patient and wait for them to respond
2. Be knowledgable about anything, particularly science, philosophy, politics, or the latest technology trends
3. Do not laugh at their ideas, they spend a long time to formulize their ideas and speak up, so don't ridicule them
4. Give orders and order them to do things your way without question, every INTX hates this.
5. Read a lot of books, especially non-fiction, you have to be knowlegable to communicate with them.
6. Most INTX are plagued with self-doubt, so you really have to be patient
7. Teach them how to flirt with the opposite sex. Most male INTX have an awkward interest in the opposite sex, but their self-doubt and Ti won't
let them make the first move.
8. Most INTX are obssessive about a problem they can't solve, so you can ask them what problem this is, help them think it through and unload the burden
9. Most INTX have the intellect, but lack confidence to succeed in the extroverted world, and their ideas are revolutionary. So it really helps if you can help build their confidence and extroversion.
10. Do not call them boring, every INTX hated this.
Anyway, thats all I can think of for now.