for bugs, i find rubber-duck pairing tends to get most of the advantages of pair-programming. for the c-c-c, i was just meaning toying around with new code "ideas". I suppose parallelizing approaches is a good optimization for a certain class of solving strategies, but I was more meaning to imply that your coworkers may have insight into other things (one of my coworkers is all about python, another used to do natural language stuff and i happen to have a degree in psych, so we all bring a different perspective to the same problems, and that is useful.)