Plus they get their memory banks wiped now and then, maybe to conserve disk space. 
*poshy brit-accent* Eu, I'm afraid I know MUCH too much now. You know hwhat they say; ignorance is bliss. Now I don't have to remember those slaughtered people in theuse dreadful clone wars. *ZAP!* Hello, how do you do? I am-
-*sigh* I'm fiiine, C3p0.
-I'm sorry, have we met at a previous encounter? Pray tell!
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Don't kill me, I'm charming!
[This message has been edited by Nimrod (edited April 09, 2001).]