98. People who say they "could care less" when they actually mean they "couldn't care less."...
"Could care less" implies that there is some level of care about the topic that could be reduced. Likely, if the level of care about the topic were reduced, there would be no comment at all.
"Couldn't care less" implies that the bottom level of carrying has already been reached, no further reduction of the level of care is possible.
While there is a subtle difference between the two, I couldn't care less.
Or maybe I could.
6D, 40, 50 1.8 II, 50 1.8 STM, 24-105L, 90EX, 2X 600EX-RT, 2X Lightsphere, ST-E3-RT, Kenko DG set, GT2531LVL, Ultimate GP, PRO-100, SPYDERPrint, MG3122, PA242W-BK-SV, Intuos Pro, WIN 10 on hardware with intent, AE-1, D-70, D-80, P30T