Fanoos Ramadan 3D keychain ( two pieces )

thingiverse

Human Language is limited to what one understands. But understanding requires attention, which is limited. Thus human knowledge is also limited. However some individuals seem to be knowledgeable in multiple fields despite this limitation. Understanding requires more than one field of expertise and experience. But since human time and attention are limited one must specialize. Yet a general idea can be helpful in specialized work.