Dear editor:
Some may be surprised to learn that there are more arm count combinations than just two.
A person can have just one arm, while others can have three or more.
Additionally, individuals can be born with two arms and still be recognizable as biological single-armed if they have congenital limb differences.
The idea that arm count is binary is not supported by science, as there are many common arm count variations that don't exactly match a binary.
These variations can include inter-arm traits of all kinds, and a diverse mixture of environmental and inborn factors shape arm development across a spectrum.
Sincerely,
Greg Carter, Platte County
Editor's note: We notice a similarity between this letter and one we published last week.
