Provide arguments why the list 1357 246 is not an enumera

Provide arguments why the list 1,3,5,7, ... , 2,4,6, ... is not an enumeration of natural numbers.

Solution

To tackle this Qn first lets look at the definition of enumeration:

An enumeration is a complete, ordered listing of all the items in a collection.

Here, the odd numbers are ordered before even numbers. Hence, the sort order is not natural or not right according to enumeration principle.