Which statement is true about queries?

The statement that some queries can classify as both Know and Do is true because queries are often complex and multifaceted. Users may have overlapping intents when searching for information. For instance, a user may search for "best pizza near me." This query could fall under the category of "Know" since the user is looking for information about pizza places, but it also falls under "Do" as the user may intend to take action by getting pizza from a specific location. This dual nature of queries highlights the nuanced understanding needed for effective search and analysis, making it clear why this classification is valid and important for search engines to process user intents accurately.

The other statements do not capture the complexities of user queries. Some queries do not require a specific action (as with pure informational searches), and not all queries fit neatly into the Know and Do categories. Therefore, the chosen statement reflects a more nuanced understanding of how users interact with search engines.