Board Thread:General Discussion/@comment-26811160-20151220053636/@comment-26811160-20151220055335

The problem with this is that I don't think the writers thought it through when they showed the baby in A Tale of Two Stans. Because, for example if the grandfather had kids at 20 that would make Dipper and Mabel's dad 20. That would also mean he had them when he was 8 which would be impossible.