Play consists of taking a tile, discarding, and the claims — chow, pung, kong — in the prescribed order of turns (3.6.2); A player is waiting when a single tile would complete their hand (3.4.21); A flower replacement is drawn from the back end of the wall, repeated until the hand holds no flower...
Why people argue about this
People often assume that waiting for a single tile doesn't allow you to discard immediately, thinking it's strictly about completing your hand with tiles from your rack. However, the actual rule allows players who are waiting to draw and replace flowers as needed, ensuring they can still play their turn by discarding if they have any other tiles in their hand.
