Genealogical sources of all kinds contain errors, both accidental and intentional, that mislead. Standard tests expose the errors, helping researchers make correct conclusions.
Tom Jones is an award-winning genealogical researcher, writer, editor, and educator. He has co-edited the National Genealogical Society Quarterly since 2002, and he is the author of the textbooks Mastering Genealogical Proof and Mastering Genealogical Documentation. He has been certified by the Board for Certification of Genealogists since 1994. A professor emeritus at Gallaudet University in Washington, D.C., Tom teaches genealogical research methods at week-long genealogy institutes. He speaks at national, regional, and local seminars in the United States and internationally, and he writes frequently on genealogical evidence, proof, and problem solving.