spoilers of course: question about diabetes vs attack
teddy says something to the effect that lenny killed his own wife with insulin.
he also says that his wife survived the attack. clearly there was an attack if lenny suffered brain trauma and the whole movie is not a dream.
are we to understand that:
-there was an attack (with a second attacker perhaps)
-wife survived and lenny lost memory
-lenny then poisoned wife with insulin at some later date, possibly as the result of a test from his wife (he has no memory of it of course)
-lenny then crafted the memory that his wife died in the attack
-lenny THEN decided to go hunt the second intruder