According to us the words "new skill" in the improvement chapter insinuates that you can't chose a skill that you already have but that seems not to convince him. Is it written somewhere clearly in the rulebook (LRB 5) that you can't take a skill twice for the same player (as it was possible for some skills in 2nd edition for example) ?
Thanks in advance.
Post Scriptum : Concerning Extra Arms we can tell him that a player having one or more extra arms has +1 and no more, as written in Extra Arms skill description, so he can chose Extra Arms again but his player will remain having +1 and not +2, but this is a general question. I suppose he will try to take another skill twice if we can't prove him this is forbidden !
