is the roles set in stone

i noticed when people say bot they usually mean marksmen and support they go bot lane mid is full of mages or assassins that cal easily kill mages, as well as the top being tanks or bruisers im asking why support doesn't go top or why the tank isn't mid or bot are these things set as the norm or are they the rules is it reportable to play support top ar to play tank bot lane

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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