No. It could be any range of issues, from the way the veteran presented his or her application form and how they filled it out to the fact that there might be an incident in their past that they're aware of but didn't think was important. Then, when their lawyer looks at it, they realize that, and say, “We think that if you presented this information back to the department, they would grant...”.
It depends on the particular circumstances of the case and the particular veteran and how they apply to the department. It's a wide range of things. It's not one thing so that you might be able to say to all the clients, make sure you do x. That won't solve it. It's different.