Gregory's Server@xkcdbot Three panel comic.
1. No hair sitting in front of a laptop. Pony tail is standing behind them. No hair says "When I started this morning there were a few edge cases I was confused about.
2. Zoom in on no hair, who says "But now, after a full day of research,"
3. Zoom back out to both figures. No hair says "I'm confused about all the regular cases too."
Pony tail says "Ah, actual progress."