Each team consists of 5 active players and 1 coach; Standard positions: Carry (Pos 1), Mid (Pos 2), Offlane (Pos 3), Soft Support (Pos 4), Hard Support (Pos 5); Coaches may communicate during the draft phase and pauses only (not during live gameplay)
Why people argue about this
People often assume that having 5 active players means you can freely swap in and out of the team during a match without restriction, but actually, each player is locked into their position for the duration of the game as per Dota 2's standard setup, which includes one coach to manage strategy and tactics.