Ice cubes in water, does the water run over?
That is all very well for the ice that is already in the water, but the ice in Greenland and large areas of Antarctica are above sea level. If they melt, and Greenland has a lot of people worried, then it does increase sea level. Also if sea water is warmer, it expands and raises sea level a bit. This winter in the mid Atlantic has been colder than for the past several years, but hardly as cold as it was 30 and 40 years ago when I first started living here. On the other hand Australia had 120 degree temps before the fires which were not helped by the 12 year drought they have been having.
Justify your assumption that the icecaps over Greenland will melt.
Global average temperatures the past ten years have decreased. Before that, over the entire previous century, they rose - AND FELL - continuously over the same 1/2 of one degree range.
Today, global temperatures are 2/10 of ONE degree higher than baseline - and that “baseline” was at the one of the coldest periods in the entire century.
Greenland ice is stable, increasing in the center of the island. Recent melts near the edge have stopped ( in places), reversed (in places) and been steady (in places.) Antarctica ice in increasing.