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I eventually got to one that I could answer. The answer was awk as an alternative to sed. But I had to look through at least five until I found one that I even understood the question/riddle.

Yeah, I did get one eventually, but only after some extensive Googling.

Although I did successfully register the whole experience completely put me off from participating. I don't really want to be in a community with such extreme gatekeeping.

sounds like sour grapes .

This attracted me. Every community with any gatekeeping is always wonderful. Like metafilter ($5) or sdf.org and github.com (you have to understand some technical thing)