Last night, in a quest to improve my poor understanding of grammar, I leaned the difference between i.e. and e.g. I typically use i.e. for everything, but now I know it should only be used when providing an explanation. If a list of examples is needed, e.g. is the correct choice. I've now moved up 0.001% on the dumbass scale (i.e. I'm slightly more knowledgeable (e.g. greater understanding, improved grammar)).