You just have to keep "Researching" ...
And, if you still cannot "Decide"; because, there is insufficient information to 'compare'; then, ...
"Dismiss" the "Possible" Match; but, I would add a "Discussion" indicating that they were were a "Possible" Match; whereas, you "Dismissed" that "Hint" due to insufficient information - that way if MORE information 'comes to light', at a later date, you can "re-visit' the "Possible" Match.
Reason: "Discussions" CANNOT be "Deleted"/"Removed" by OTHER Users/Patrons - they can ONLY be "Deleted"/"Removed" by the User/Patron who added/posted the "Discussion".
Just a thought.
Great feedback from Brett
Don't be in a hurry to make a relationship when the proof is lacking.
Rather create notes and discussions on the matter
if you do make a connection that is not supported by much real evidence. You may just be helping a blatantly wrong connection propagate across the Internet like wildfire.
Remember that whatever you update here in FamilySearch - can and does affect other users - one major reason - it is one single massive database and not a collection of many "user databases" - we are all working together on the same family tree.
It's a while since you asked this question, but here is an article that gives tips on whether the record is actually a duplicate record or if it relates to someone different to the person in your family lines: