Explain how 'hybrid search methods' combining keyword and semantic search address limitations inherent in either method alone for comprehensive retrieval.

Hybrid search methods combine keyword-based search and semantic search to overcome the inherent limitations of each when used independently, thereby achieving more comprehensive and relevant retrieval. Keyword search, also known as lexical search, operates by matching exact terms or their variations within documents. Its strength lies in its precision when users know the exact words to search for, quickly identifying documents containing those specific terms. However, its primary limitation is the 'lexical gap': it struggles with synonyms (e.g., searching for 'automobile' will miss documents using 'car'), related concepts, misspellings, or when a user's query uses different phrasing than the document content. It lacks an understanding of the underlying meaning or context of words, leading to missed relevant documents if the exact keywords are not present. Semantic ....