We are living longer - scientists say that old age has been pushed back by as much as 30 years. That's a plus, but it's also a challenge: to extend mental productivity by as much as 30 years. Or even increase it significantly. After all, the cumulative effect of life experience can work - why not live several professional lives, and have several careers?
To keep up with the digital age and easily understand the increasingly complex world around us, we need to "sharpen" our brains, and get a meta-knowledge of how our intellectual systems work. And we can also revise, upgrade, remove obsolete programs and download new ones.
I invite you with me on this fascinating journey.