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: The rate of rise started to slow down about 8,200 years before present; the sea level was almost constant in the last 2,500 years, before the recent rising trend that started at the end of the 19th century or in the beginning of the 20th.