Maybe the corresponding fingers on your other hand really are different in length. Mine are. Whenever I press my fingers against each other such as to line up their bottom creases (keeping the orientation of the fingers as straight as possible), the middle and upper creases and fingertips don’t line up. My right fingers are slightly shorter.
Good point about the photocopier. Hopefully these issues won’t add too much noise to the results and obscure any significant results.
Maybe the corresponding fingers on your other hand really are different in length. Mine are. Whenever I press my fingers against each other such as to line up their bottom creases (keeping the orientation of the fingers as straight as possible), the middle and upper creases and fingertips don’t line up. My right fingers are slightly shorter.
Good point about the photocopier. Hopefully these issues won’t add too much noise to the results and obscure any significant results.