If you use information from a genealogy book, do you then research the information from that book to see if it fits?
For instance, for my Trueblood and Steere lines there are genealogy books that have basically become the 'bibles' and 'sources' for our families. But digging deeper into them there are still unanswered questions.
If someone who spent years of their life researching the family and didn't come up with an answer, do you still keep working it? Do you just accept the information from that source and move on?
Or do you treat the book as another source that could be fallible?