http://tdylf.com/2011/04/20/the-ten-coolest-movie-tattoos/
Fact 5: Drug dealer (self applied)
Fact 6: car license number SG137IU (parlor)
very obvious. NOT a plot hole
Christ... *learning* how to create some jailhouse tattoo kit is creating a *new* memory.The step by step process of learning how to tattoo oneself is creating a new memory.
Finding what you are looking for in some huge file is creating a new memory. Knowing that you have said file to reference is creating a new memory. Remembering to take pictures of someone with a camera (unless he always took photos of people prior to his injury) is creating a new memory. He has to *remember* that he has a camera and a file, and where to turn in the file, and how to get back to his hotel, and a boatload of other things that he just shouldn't know or remember to do. I feel like I need to watch it now and take notes of all the times he knows to look for pictures in his pocket or how he doesn't have to reacquaint himself with some huge file. Yes, he has tattoos... but, IIRC, he is clothed most of the movie.
The guy creates an entirely new set of rules to live by... but these rules are rarely visible. I don't recall how long he could remember something - but it wasn't very long.