Because the mind is 'unobservable'
"extolled" means to praise some thing highly.
Answer:
In the aftermath of World War I, Germans struggled to understand their country’s uncertain future. Citizens faced poor economic conditions, skyrocketing unemployment, political instability, and profound social change. While downplaying more extreme goals, Adolf Hitler and the Nazi Party offered simple solutions to Germany’s problems, exploiting people’s fears, frustrations, and hopes to win broad support.
Explanation:
https://www.ushmm.org/learn/holocaust/path-to-nazi-genocide/chapter-1/aftermath-of-world-war-i-and-the-rise-of-nazism-1918-1933
It is only vehicles? Or can it be other things too. But trains also require a ticket.
Answer:
20 thousands bobs opportunity cost