Based on this discussion, I have edited the profile for Isaac Snow so that it does not link to any parents. I moved the unsourced text regarding parents from "Bio" to a new "Notes" section, referencing the latest Mayflower Families Silver Book data. The unsourced connection is noted in the Notes for Isaac Snow, Ephraim Snow, and Martha (Rogers) Snow so that if sources are found, it will be easy to reconnect these profiles.
Note that the FamilySearch profile for Isaac has his date of birth as 1760 (also unsourced) rather than 1777, and no parents are linked to this profile.