Board Thread:General Discussion/@comment-5474309-20150831234533/@comment-5474309-20150901063206

Screamteamcreator wrote: Interesting math, but you're basing your entire theory around a theoridical date. We don't know if Stanly and Stanford were born in 1953, I mean, they never reveal their birthday on the show (unless I'm misinformed). So unless we have a canon date of their birth, I won't go counting years just yet. Plus, there's always the theory that the baby in Tale of Two Stans was not Shermy. 

I just used that as a starting point. Though, from the episode we do know that the brother was born some time around the 1970s.

Mr B Natural wrote: Why are people assuming that the baby was Shermy? Couldn't he easily be a much older brother, and the baby could be a different sibling?

Poissibly, but there's no other brother shown in the show yet, so we can only assume that baby was Shermny at this point in time.