Posted September 05 2001 - 12:23 AM
I think your conclusion is true. Implied evidence:
1) Remember Sammy Jankis tattoo, placed on his hand so he sees it immediately almost every moment of the day. The theme of "Lying to yourself to be happy" and creating a reality for yourself is revealed over and over again. This is how Leonard creates his own reality. Through repetition, routine, and conditioning, he remembers Sammy Jankis which prevents him from remembering the truth.
2) Teddy's comments at the end. "It was your wife who had diabetes." There's no logical reason he would lie here, especially about that. Also, after discussing Sammy, Teddy talks about lying to yourself to be happy.
3) The police file. The only logicial reason why it has been altered (presumably by Leonard) would be to hide the truth, the actual result of the attack -- ie, his wife lived.
4) A quick shot of Leonard in the mental hospital. Sammy Jankis disappers and Leonard is shown. Seemingly, the only reason it would be shown is to imply Leonard's story is really Sammy's story.
5) Also, given the amount of time dedicated to the Sammy Jankis story, it would seem odd if it didn't have more to do with Leonard's life than simply a story he tells everyone. Plus, it would seem like quite the coincidence that he knew someone with the same condition.