Miss Danner, a primary school teacher, is on her way to school - it's the first day of school this year.
In class, she sees two identically looking boys sitting in the first row.
Aw, twins, so cute!
We aren't twins.
the boys respond unisono.
Miss Danner - astounded - doesn't comment it further. After class, she takes a look into their school files and finds the following:
Thomas Elmer born 5.2.2008 contact person(s): Franz Elmer (father), telephone 013579 Sophie Elmer (mother), telephone 012468 Maximilian Elmer born 5.2.2008 contact person(s): Franz Elmer (father), telephone 013579 Sophie Elmer (mother), telephone 012468
(I thought this was taken care of by using the word identically, but here you go: Miss Danner is very curious, so that on the next parents meeting, she takes DNA samples from the parents. As Maximilian and Thomas attend her class, it is not a problem for her to acquire samples from the boys, too. She takes all four samples to the lab and the laboratory technician tells her that the two boys are undoubtedly the children of Franz and Sophie (and no one else). The lab technician did everything right and no one in the story is lying. Both the boys were naturally born by Sophie on the same day in the same hospital.)
How is that possible?