I think his point would be best supported by the note that the study has not found a statistically significant difference in mortality between the restricted an

I think his point would be best supported by the note that the study has not found a statistically significant difference in mortality between the restricted and unrestricted diets. It found that aging-related causes of death (cancer and heart disease) were reduced by a factor of three. This implies that the calorie restricted monkeys had higher-than-control rates of mortality due to non-aging effects, such as anesthesia and disease.