Dual Search

Semantic search and Boolean search each have distinct strengths and weaknesses. Semantic search excels at finding conceptually relevant results even when terminology differs, but it can be less precise and its results are harder to reproduce exactly. Boolean search provides precise, reproducible results based on exact keyword matching, but it requires lawyers to anticipate the right terminology and can miss conceptually relevant results that use different language.

Dual search recognizes that the optimal research strategy often combines both approaches. A lawyer might start with a semantic search to identify the landscape of relevant authority, then use Boolean search to ensure comprehensive coverage of specific terms or phrases. Alternatively, a Boolean search might identify key cases, and a semantic search can find additional authority that addresses the same concepts using different language.

The implementation of dual search varies between platforms. Some offer separate search modes that lawyers toggle between. Others integrate both approaches in a single search, using semantic understanding to expand results while maintaining Boolean precision. The most effective implementations make the dual nature transparent, so lawyers understand which results came from semantic matching and which from keyword matching.