Filter Logic Labels
It takes a while to wrap your head around the logic terms for filters.
May I suggest replacing EXACT, AND, OR, NOR with EXCLUSIVELY, ALL, ANY, NONE, respectively?
A really cool feature but a bit more out there would be to have the filter page form a sentence describing the filters you have chosen in plain English.
eg. "You are filtering for ALL entries tagged Main Injector and NuMI and written by Kyle Hazelwood but NONE tagged Recycler."