Cognitive change as a normal process of aging has been well documented in the scientific literature. Some cognitive abilities, such as vocabulary, are resilient to brain aging and may even improve with age. Other abilities, such as conceptual reasoning, memory, and processing speed, decline gradually over time.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4015335/
Cause we are materialists.
Fuck off with your anti-science agenda.