Clifton of St. George

There’s a black man in Bermuda who asks each tourist he encounters this specific question:

how old should someone be before allowing them to drink?

There’s a tourist in Bermuda who answers if they’re old enough to die.

There’s a black man in Bermuda who's asked if he remembers being born and answers he recalls that original swimming.

There's a tourist in Bermuda who knows the only knowledge is I am, yet in the deeper water asks his ginger beer and black Bermuda rum:

but who am I?