The answer's out there . . . somewhere
I began to wonder how many genealogical researchers give up simply because they can't find something. We hear of courthouses making discoveries of old documents that they didn't know they had from time to time. Perhaps that record we needed was among those undiscovered documents. Perhaps we think we are looking in the right place, but we didn't realize that location was in a different county at the time or perhaps the records were transferred to a different location.
As genealogical researchers, we must not give up on the quest. We need to ask the right questions of the right people to find the results we need.
I was a county coordinator and state coordinator for the USGenWeb Project for many years. I could always tell who the newby researchers were because their queries lacked focus. We need to learn to be specific about the information we are seeking. Perhaps we need to say, "I'm trying to determine the year that Great Uncle Bob moved from County X to County Y. He was here in the yyyy census, but not the yyyy one. I thought the land records might show me when he moved." Perhaps the records will cooperate and tell us the information we need to know, but the person you ask might say: "If you don't find it there, you might want to check the tax lists" or "Did you know that County Y was a part of County X until yyyy? Perhaps your ancestor never moved." If the researcher had just said "I need to look at land records," he might not have received the helpful piece of advice from the other person.
We'll probably still have a lot of unsolved mysteries, but we can keep pursuing the truth.