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

After watching the episode, "A Tale of Two Stans" and reading the wiki article of both of the Stans stating that they were born in the year 1953. It left me with some questions on how their younger brother, Shermy, could possibly be a grandpa at a reasonable age.

Considering Shermy Pines was born around the time when the two Stans were likely 12 graders in high school that would make the two Stans around 17 years-old at the time. Since the two Stans, according to their wiki pages, were born in 1953 that would make  Shermy Pines birth year of around 1970. We also know that Dipper and Mabel Pines were born around the end of summer 1999, so that would mean at the time of Dipper and Mabel's birth their grandpa would only be 29 years-old. That is quite young to be a grandparent, though still possible but only through teen pregnancy, which would be strange for Disney to have a show that would have that.

 Dividing 29 in half would give the rough max age for both the father and grandfather to have impregnated their wives if they did at the same age, which would only be 14.5 years-old (making Mabel and Dipper's father's birth year roughly late 1984 or early 1985). You could adjust the ages a bit such as one of them being 12.5 and the other being 16.5, though I wouldn't put any one of them lower than 12 years-old for either (considering puberty and all...). The fact is there's no possible way that either Dipper and Mabel's father or grandfather were legal adults when they impregnated their wives given the numbers.

Anyways, doing the calculations that would make, as of 2012, Shermy Pines (their grandfather) roughly only 42 years-old and Mr. Pines (their father) roughly only 27.5 years-old.  