So basically we do see in two-dimensions, since anything we see in everyday life could easily be shown in a picture. For example, say you're looking at a box sitting on some surface. This same image could be put in front of you as some sort of blown up photograph of the real thing and...
I have read things saying humans see 2d and also things saying its more like "two and a half d" but that humans don't actually see in three dimension. But when you explain the spatial dimension, you start with the first which can be explained by a line. So anything living in 1d would only be...