Aging and cognitive decline is real. I do notice I don’t respond as quickly as in my twenties when presented with problems that require logical reasoning and abstract pattern recognition for example. This is usually not a problem because most of the tasks I execute on a daily basis don’t require these skills. But it is evident that the decline is there and I think it’s important to recognize it. On the positive side at this stage of my professional and social life I believe experience is much more important to succeed than sharpness of mind. However experience is memory and memory also declines with age.