The piece got a lot of attention, some positive, some negative:
- R. J. Snell responded critically to Hart's position in "Understanding Natural Law: A Response to Hart and Potemra," although the piece carries an earlier publication date (Public Discourse, February 27, 2013).
- Edward Feser was another of Hart’s critics, responding in "A Christian Hart, a Humean Head" (First Things, March 6, 2013)

One of the best books I can recommend to give the novice a sense of the distinction, and a powerful sense of how compelling natural law argument can be is J. Budziszewski's What We Can't Not Know: A Guide.
[Hat tip to C.B.]