The syntax for counting the number of unique values from a list of a column using the array formula is as follows: =SUM(IF(COUNTIF(<first cell from which you count the number of unique values>:<last ...
The smartest thing Excel does happens in places you can't see.
For users who are struggling with handling Microsoft Excel when trying to copy the same name multiple times without making it confusing, a simple procedure needs to be followed in order to count a ...