Each team consists of 5 active players and up to 2 substitutes; Standard roles: Top Laner, Jungler, Mid Laner, Bot Laner (ADC), Support; Coaching staff may communicate with players only during designated breaks
Why people argue about this
People often assume that having up to 2 substitutes means they can be freely swapped in at any time during a game, but actually, these subs are only used when active players get banned or ejected from the match, and then they're brought in as replacements for those specific roles based on their skill set.
