How Accurate is the Family Information in the FamilySearch Web Site?
Family information on the FamilySearch Web site comes from several sources. Information in the Ancestral File and the Pedigree Resource File is submitted by individual researchers, and depends on the sources a person used.
It is best to contact the submitter to ask what sources were used to compile the family information.
FamilySearch has the 1880 and 1881 censuses, and the International Genealogical Index. Most of the information in these two databases was extracted or transcribed from the original documents.
It is best to check the original documents to make sure that the data online was read correctly.