I read the title of this thread, and assumed a different meaning. Silly me. I assumed everyone understood the difficulties of projecting a closed, 3-dimensional surface onto a flat, 2-dimensional sheet of paper.
Then I realized a lot of you are still in school. OK, no problem. After all, you gotta learn somewhere.
What I thought of was the fact that at least some commercial atlases DO lie, and lie deliberately.
While I cannot say for sure that this is still done, atlases would often 'misplace' certain things. Say, move that highway a half-mile north, or that town a mile east. Or more fun: remove that town, or insert a non-existant one!
The reason was copyright. It's easy to demonstrate plagerism with words. But a map is really just a picture. By 'tweaking' the picture a little, they could take rival map-makers to court: "You have the town of St. Plgorski on your map in the same place we do. But it doesn't even exist except on our maps!"
I always thought that was rather silly. People buy maps with the expectation they are reasonably accurate, and without deliberate mistakes.