Well I'm not 100% sure about how the Introverted logic function manifests itself, but I would say I'm fairly good at "understanding logic and structure, categorizations, ordering, logical analysis and distinctions" (Wikipedia) etc etc without external help.
Have I totally misinterpreted the Ti function itself, or rather the nature of the 5th function?
LII kthnxbai!
Watch out for Wikipedia. It'll be 'other system'-ridden. Use Wikisocion instead.