Restrictive vs. Non-restrictive Elements Answer 2

The American students knew by heart the exploits of Davy Crockett, a legendary American war hero, but they knew nothing about Wovoka or Meister Eckhart or any spiritual leader but their own.

Answer: Correct!


Commentary:

Here "a legendary war hero" refers back to Davy Crockett. However, there is only one Davy Crockett. Therefore, this is already well-specified, and it should be set off with commas.