Dumbledore has a boss Zefron poster in his office.

"A true war story is never moral. It does not instruct, nor encourage virtue, nor suggest models of proper human behavior, nor restrain men from doing the things men have always done, If a story seems moral, do not believe it. If at the end of a war story you feel uplifted, or if you feel that some small bit if rectitude has been salvaged from the larger waste, then you have been made the victim of a very old and terrible lie. There is no rectitude whatsoever. There is no virtue." pg. 65

Then by O'Brien's own standards, he's got quite a few "true" war stories on his hands. This chapter seems to define the reason for this book. As one opens the front cover and turns to the title page, one will find "A work of fiction" just above Tim O'Brien's name. That's not to say nothing in there is true, because he had to have gotten his material from his experience in Vietnam, yet it gives off a sort of "Why am I reading this if all this has is made-up war stories?" Well, O'Brien isn't concerned with the believability of the story, more so the truth. For O'Brien, though, truth in stories is felt inside the person, not in if it actually occurred. Who cares if it happened? It's the truth.

"[Sanders] wanted me to feel the truth, to believe by the raw force of feeling." pg.70