Dementia is a state of mind one [generally] associates with the elderly ... yet, this is NOT NECESSARILY [always]
the case. ... because - as the intriguing, article [undernoted] shows - the sense of directional and navigational ability steadily diminishes considerably from the teenage years onwards ... !

www.bbc.co.uk/news/health-37988197 ...

Surprised? So too, was I!

Now ... where the hell are me specs?