Steps to reproduce the issue

Go to Smart Search >> New Filter >> Edit Filter tab
Currently we can search by type, categories etc and tick on what we want included in the search.

Expected result

It would be very useful if we could invert the search so we could tick on what was not to be included instead.

So we could have a category for all articles called "Not Searchable". And tick that so all article categories are searched apart from that one. Otherwise you need to remember to add a new categories to the search filter and this just is not realistic for some admins on some sites.

Thank you :)