List Item Validation With The Content Type Field

Question

Is it possible to use a validation formula with the content type field?

Something along the lines of:

=IF([Content Type]="Project",Status="Closed",IF([Date Closed]=TODAY(),TRUE,FALSE),TRUE)

My list has more than one content type and the Date Closed field is not used in all of them.

List settings --> Validation settings

Answer 1

No, it's impossible to use the content type field in list validation.

As a workaround, you could create another column and copy cotent type to it.