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While education borrowing is likely to be a wise investment in your own future earning potential , it is also wise to borrow only what is necessary to meet the basic education expenses covered in the financial aid budget , in combination with your own resources , your available family resources , and any alternate funding sources such as term-time employment or outside scholarships . Using a demand driven approach not only enables us to analyze only what is necessary in order to apply an optimization but also enables us to develop techniques in which the time and space overhead can be controlled and limited . This strategy must also recognize that family functioning is inescapably tied to community economic circumstances and opportunities and build connections between now largely separate community economic development approaches and health , education , and human service reforms.63 Finally , as we move to a new century , we must continue to grapple with the question of not only what is necessary but also what is sufficient to guarantee a future for all children and families . For only what is rare is valuable ; and " water , " which , as Pindar says , is the " best of all things , " is also the cheapest . By providing greater access rights , businesses could increase the reliability and accuracy of data , build consumer confidence and trust , experience a public relations benefit , make better decisions based on better data , expand markets by giving consumers greater confidence in online privacy , and experience greater efficiencies if they limit information collection to only what is necessary . Encourage AAJs and AOs to limit changes to only what is necessary and to not make changes on a repetitive basis on the same case . The proposed approach uses the opposite strategy : it attempts to track only what is knowable ( initially , geometrical shape and target density ) and only later attempting to resolve individual targets out of the " multitarget background " as ( and if ) more data becomes available .