David Hockney Secret Knowledge. Word Search Puzzle Solver. David Hockney Secret Knowledge word Search Puzzle Game. Find words related to movie actors, actresses, and genres. Word Search Puzzle Solver. Artist David Hockney discusses his theory that artists were secretly using optical devices such as mirrors and lenses in creating their work as early as the 15th century. This includes identifying and searching for words that are related to : Documentary, David Hockney, Documentary, David Hockney .