Out of curiosity, why is it that only humans act? It seems to me that dogs act too and while their actions may have limited consequences their actions should be considered since their actions have consequences.
I find this sort of argument disingenuous at best and downright discrediting at worst. I am highly disappointed with Hoppe’s use of the idea of a “performative contradiction.” The argument is simply worthless. It is not persuasive and it (necessarily) cannot prove anything that has not already been assumed. If it doesn’t need to be assumed, then it is the conclusion to another argument resting on some other assumptions.
There are no absolutely necessary truths and I find the effort to establish the action axiom (as in the above article) or the self-ownership axiom (cf Hoppe) as absolutely necessary truths to be disturbingly theological.