13-7a The difference in goods can be ascertained only through human actions

“If the actor, despite no physical discernible differences, chooses to evaluate differently one good from another (e.g., cow), they are no longer part of the supply of the same good.”

Next:

• 13-7b Prices can reveal differences between goods that appear identical

Related:

• 13-4d1 A good is valued not for itself, but for its service in satisfying the wants of acting individual
• 13-4d2 There is no objective value