Do you ever check out someone else's tree to see if they have something that disagrees with what you have? I know I'm usually looking for confirmation, but I appreciate seeing conflicting information. That conflicting information makes me re-look at what I have and to look harder for additional sources to support what I have.
That's likely one of the reasons I work with the tree on FamilySearch. On this tree, I can look at the changes made to an individual. If those changes differ from information I have compiled, I can message the user making the changes and/or post a discussion about the change.
Thus, I utilize the 'watch' button to mark individuals I'm researching. Not only have I marked my ancestors to 'watch' but I've also marked other individuals in my research that I'm having trouble finding sources. Each week, I get notified of changes to those 'watched' individuals.
This morning's notification list included Eliza Honor Van Valkenburg, the second wife of my ancestor, Albert J Hutchinson. That's when I discovered that there are TWO of them in the Family Search tree.
Since I haven't found birth or death information for her, I have no idea which Honor Van Valkenburg is the correct one. However, I do believe that these are the same women and that they are the same person I have in my database as Eliza Honor Van Valkenberg.