premise: Thomas C. Fletcher House is a historic home located at Hillsboro, Jefferson County, Missouri. It was built about 1850, and is a two-story, log dwelling with later frame additions. It sits on a limestone and concrete block foundation. It was the home of Thomas C. Fletcher, Missouri's first Republican governor and the first native-born Missourian elected governor.
hypothesis: Thomas C. Fletcher House was home of Thomas B. Fletcher 
reason: The name of the owner was Thomas C. Fletcher and I changed the middle name to a B. notating, at the minimum, a different person. My guess as to why the system had trouble is that it saw the names nearly or exactly similar despite the change in middle initial. 