User blog comment:Aeratus/Guide to the Adam Jensen Clone Theory/@comment-44856204-20200226175020

I remember a side quest in Human Revolution where you are asked to deal with a rogue Belltower Spec-Ops called Zelazny. When confronted, he tells you that his unit were selected for a top secret program where the got implanted a neural hub. This hub manipulates memory centers in the brain and through it, a decision to what to remember can be forced upon the individual. This would indicate that the work on this tech dates back already to before 2027 at which the technique was still experimental and not working properly, since Zelazny started to remember fragments after some time.