Todjaeger
Potstirrer
"Normal" engineers design and build things that work. "Human factor" engineers design and build things so people can use the thing that works. No having to create/breed 3 armed people or people with 2 or more sets of eyes etc.
I must work with 'Abnormal' engineers then, as they neither design and build things that work, or design and build things so people can use the things.