The possibility of curing aging is currently generating hopes and concerns among entrepreneurs, experts, and the general public. This article aims to clarify some of the key assumptions of the Strategies for Engineered Negligible Senescence agenda, one of the most prominent paradigms for rejuvenation. To do this, we present the three fundamental claims of this research program: (1) aging can be repaired; (2) rejuvenation is possible through the reversal of all molecular damage; (3) and the human organism is a sophisticated machine. Secondly, we argue that this agenda fits with a machine conception of the organism (described by Daniel Nicholson); we show that, if aging is understood from this philosophical approach, there is an internal confusion in the research program between what is repair and what is rejuvenation. Finally, we state that this theoretical viewpoint connects with scientific criticism and reinforces the idea that there are limits to the aspirations to live indefinitely young.