If you think that OOP advocates can't decide on what OOP is, don't look too hard at the FP side of the world. :D Same goes for evidence based ideas. Odds are

If you think that OOP advocates can't decide on what OOP is, don't look too hard at the FP side of the world. :D Same goes for evidence based ideas. Odds are stupid high that you cannot find a single large scale codebase that has succeeded using any "pure" technique. Heck, I'd take small scale codebase for a fun thing to look at, at this point. Make performance a requirement, and really get ready for tears.