User blog comment:GodzillaMaster/Final Thoughts on the Citadel DLC/@comment-2250460-20130306192136/@comment-3046679-20130306193548

After a random clone that pops up a year after Shepard's already up and about, I expect anything.

Also, shows that Jacob didn't know crap. "Yeah, pretty sure you're not a clone." Well, he has clone-grown organs. While not being a full clone, those bits still constitute into the definition. And apparently they've grown everything except the hip replacement, hence the limp in ME2.