SOLVED! It was a DAU/Picnic error! I was missing the row number after the column name. Apologies, I'm not able to delete/close the original question.
________
I have a column named "Complexity". It's a drop-down list. The options in the drop down are: Rudimentary, Light, Intermediate, Advanced.
Might you please shed some light on why this formula results in "#unparseable"?
=IF([Complexity]="Rudimentary",0,IF([Complexity]="Light",1,IF([Complexity]="Intermediate",2,IF([Complexity]="Advanced",4,"99"))))