Hi, everyone: (1)One common example is getting birth dates of customers, who see no reason to share their age, notes Anne Milley, director of technology product marketing at SAS Institute, so you get false data, such as the easy-to-enter 11/11/11, or no information at all. (2)In such cases, thought should be given to whether you really need that information for your analysis and, if so, how your analysis will account for the missing data so results remain meaningful, she says. (3)This kind of thinking should be done before you deploy data collection, transformation, mining, analysis, or reporting systems, she adds. Could you explain to me the meaning of the red part in the context? More explanation: I look it up in my dictionary. But I cannot understand.