Recall the two premises used by the armchair psychological egoist: (i) What motivates us to act is always a desire; (ii) all desires are to be understood on the model of hunger. The second premise is implausible, as we have just seen; and, since both premises must be true for the argument to reach its conclusion, the argument can be rejected.
Extraction notes
Validity: Extracted via Max plan + API grounding/validity checks