No check :-) but I had a long email exchange with Knuth about 25 years ago* about a difficult and interesting math/programming problem that had to do with the most efficient way to partition data given various constraints. I didn't realize until later that I was interacting with the author of TeX and The Art of Computer Programming, even though I used TeX in college ( when it was new and exciting ) and had spent a lot of time with TAOCP. Focused on the problem and didn't connect it or his name.

Have fun selecting your typeface, that's a good problem to have!

*BTW email was sort of exclusive and exciting then too.. pre-www.