Any metalworking operation which can be done by machine can also be
done by hand. Is this statement true oe false?

One could argue that anything done by mills, drills,lathes, and grinders
could all be done by hand. Albeit at an extreme loss in productivity and
accuracy.

if one would add submicron parts and things made with EDM machines... These
are impossible to make by hand. One example part is made near me. A computer
hard disk is a bit like the old phonograph player. The arm and pickup for
the disks is called a suspension assembly. A thousand men in a thousand
years couldn't make one of these by hand.

Karl