I read that eXtreme Programming isn't XP, if there's no Pair Programming. But is there something inherit in XP that requires Pair Programming other than philosophy, if other types of quality engineering guideline are followed (maybe TDD, for example.)
I understand what Pair Programming is, read lots on it, no never tried it, and I'm not trying to knock Paired Programming, nor trying to get convinced for it. I only wanted to know if XP can be useful without it. There was much I liked about XP.