Yeah I know how exp splits and stuff what I meant was how does that classify as a role.
Roles are things like carries and supports, not what lane people go to.
top lane usually has bruisers that anti-carry and don't help the team early-early mid game. the only time you'll see more than two people in that lane is when someone's ganking, so it's mostly 1v1. there are a few ap carries like kennen/vlad who can top a bit better than they can mid, but it's only because they have decent range and excel at out-ranging.
mid lane is the ap carry who has the most important and play-making lane. from mid you can gank top or bot, help invade, steal wraiths (if you're like vlad, zyra, etc.) and help contest/take dragon. some people will lane someone like talon or pantheon mid, but it's not viable in high-rated play.
and of course, both of these lanes rely on countering the forget out of the other so they can be useless.