I would very much like to make use of OR statements in the search fields, i.e. '(title OR abstract):(Authority OR Precedent)', while searching through my library and configuring your so called 'smart lists'. I look forward to any reactions on this feature request.
You can do this. Just make sure to capitalize both letters. Your query would look like the following:
title:authority OR title:precedent OR abstract:authority OR abstract:precedent