"Scientists have also found evidence that smoking might, in some circumstances, help prevent the onset of various dementias. Many dementias go hand-in-hand with a loss of chemical receptors in the brain that just happen to be stimulated by nicotine. Smoking seems to bolster these receptors, and smokers have more of them. The theory is that smokers may then have more to lose before they start losing their minds. "It does seem that nicotine has a preventative effect"
https://www.theguardian.com/lifeandstyle/2003/aug/07/shopping.health
20 Years of Alzheimer's research built on a lie?
Smoking prevents memory loss?
Smoking helps retain wisdom and knowledge?
Gnosis?