claim: Ocean levels have been rising for the last 20,000 years[ … ] No climate scientist can tell you when natural sea level rise stopped and man-made sea level rise began.
evidence: Since the last glacial maximum about 20,000 years ago, the sea level has risen by more than 125 metres ( 410 ft ), with rates varying from less than a mm / year to 40+ mm / year, as a result of melting ice sheets over Canada and Eurasia.