My great-great grandfather, lived in Denison, Texas. He lived in the same house from 1910 until the day he died in 1969. My dad knows this for a fact. He used to live across the street from his great grandfather when he was little.

However, the 1920 census and a couple of other things show he and his wife, Lucy and their children, lived in Bexar County, San Antonio.

How is this possible?