A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 3 June 2014
From here: viewtopic.php?f=59&t=106980&p=1409031&hilit=egg#p1409031 (First question)
The card text says "Create a copy of a target Personality". To copy a personality, i guess you check each stat and copy it to the created card, but the text never references "base" stats, and I can't find anything on the CR that say that you should use the base stats when you copy a personality.
Copy: Some effects may copy a keyword, trait, or stat from one card to another. If a stat is copied, set the copying card’s stat to the current value of the copied card’s stat.
Every other game procedure that checks a personality stat, check the actual one, not the base unless it explicitly says it does. Why does Egg of P'an Ku work differently?
Brook Cunningham (rules official), 16 June 2014
From here: viewtopic.php?f=59&t=106980&p=1409031&hilit=egg#p1409031 (First question)
The card text says "Create a copy of a target Personality". To copy a personality, i guess you check each stat and copy it to the created card, but the text never references "base" stats, and I can't find anything on the CR that say that you should use the base stats when you copy a personality.
Every other game procedure that checks a personality stat, check the actual one, not the base unless it explicitly says it does. Why does Egg of P'an Ku work differently?
The definition of the word "copy" you're citing is for the verb.
Egg of P'an Ku Exp creates "a copy" of the card, being a noun, synonymous with the printed "copys" of the card that you put in your deck.