I understood about deep thought right away, but I thought it was about a chess supercomputer from the late 80s, and I kept digging this way. I didn't even realize that there were prepositions hidden there, probably because English is not my native language.
But the second giveaway I can not open in any way, even now with your hint that it is the letter i (before that I myself tried all the letters) it does not work, although I for the sake of interest even put it in any possible order, that I even found some giveaway from 2014 (D0jiH) but not yours.