Explanation of main plot hole.

Rating: Null/10 (30 December 2001)

Much has been made (in other comments or in Goofs) about the fact that Leonard "remembers" he has a memory condition despite the fact that he can't remember anything after his wife's incident. I think that he actually deduces this each time. He knows he can't remember what has just happened, he sees the tattoo on his hand (the only tattoo not normally covered) that says "Remember Sammy Jankis". As Sammy is something he can remember he then deduces that he has tattooed that because he has the same condition. This may explain the presence of the Sammy scenes. Of course it's very coincidental that he has developed the same rare condition as one of his previous investigations, or is it? I enjoyed the movie because it made me think all the way thru but it's not a 9 or a 10.