This can be difficult to do, for we all know records can be wrong, just as humans can be wrong. Simply write down exactly what it says and keep working, keep researching. Just ask that they show it to you. If you are wrong, admit it and go on. There are plenty more ancestors to be right about, and the complicated family scenarios, while they exist, do not exist in all families.
Documentation is the antibiotic that cures many things.
Citing your sources is the fresh air that rids the musty odor of undocumented research. You get the point. Copyright 1999, Michael John Neill. He conducts seminars and lectures on a wide variety of genealogical and computer topics and contributes to several genealogical publications, including Ancestry and Genealogical Computing. Parish registers, commercial and social directories, newspapers, land records, marriages, wills and administrations, and other sources can help the researcher circumvent destroyed or lost records and fill in ancestral gaps.