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@@ -650,7 +650,7 @@ In interaction rules, attributes are recognised by a modifier `int` in order to
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-- Example: Duplicator of integer lists. We note that, in the rule of the first line in the below example, the twice occurrences of *i* in the right-hand side is allowed because the *i* is a variable for attributes:
+- Example: Duplicator of integer lists. We note that, at the first line of the below example, the rule is allowed to have more than twice (here, it is three times) occurrences of *i* because the *i* is a variable for attributes:
![dup_list](pic/dup_list.png)