Thank you Ellen. It appears that in the Changes page there is information about the birth of Tabitha Stone as being in 1660/61 in Sudbury, Massachusetts vs. 1655 for the other Tabitha Stone. However, the rest of the information in that tab applies to the Tabitha Stone that married John Rice.
I am a little concerned about saying the Tabitha who married Abraham has a LNAB of Stone, without any source data. I have searched on Familysearch.org, as well as on AmericanAncestors, and have come up with nothing. She is shown with the name Stone in IGI, the Pedigree Research File, as well as the Ancestral file. Based on this, there is likely some evidence somewhere. However, since the best sources we have at this point indicate an Unknown last name, it seems to me that we should list her possible last name in the bio, and have her LNAB be Unknown.
In cases like this, it is hard to tell what to do - should we have a profile for her with LNAB as Stone (although there is no good source data to support it that I have found), or do we list her as Tabitha Unknown, with a Disputed Origins section containing the name Stone?