In other words, you could do an exact search for a particular birth date but not for your other fields.
It's important to note that turning on the toggle for Show Exact Search doesn’t immediately engage an exact search. Instead, it opens a box next to all of the screen’s search filters, which you can then select or leave empty. It’s highly recommended that you only select the fields you’re sure you want to be exact, and that you start with a few. In other words, you could do an exact search for a particular birth date but not for your other fields.