Scientists in the various fields of aging share a common goal--the extension of healthy life. However, claiming that the only way to accomplish this is to treat the complications of aging rather than its causes requires more than declarations made by proponents of SENS--it requires empirical research based on the scientific method. As this paper illustrates, it will be difficult to prove that SENS interventions work because the primary result of interest, negligible senescence, is not an outcome variable in empirical tests of SENS.
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