That would be “I’s,” rather: Immaterial, Irrelevant & Inconsequential. A joke? Maybe. Decode it and find out, then e-mail me at firstname.lastname@example.org.
This marks the final piece in this series. I don’t have correct answers for any of the others yet, so all are still up for grabs. I’ll continue to post updates, and as I’ve said before, all pieces are active for six months from the post date. At about three months, if no one’s correctly decoded any of them, I’ll provide one clue for each of them. Let’s see what you’ve got!