I thought that that was because 4^0.5 was 2, but I'll believe you and not press this further. I haven't done much testing with AA vs IR, so can't comment so much.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
