I have a ring but I need to make sure.
(Easy, accurate, 2 min commitment)

I don't have a ring and I have lots of spare time.
(Boring, slow, extremely accurate (need a printer))

I have a ring but I need to make sure.
(Easy, accurate, 2 min commitment)

I don't have a ring and I have lots of spare time.
(Boring, slow, extremely accurate (need a printer))