callsAn exposed pung tells the table part of your hand. Call because you need the tile, not because you can.
callsA discard plus two jokers is a legal call. No natural tile required, whatever somebody's aunt taught them.
callsThe call window closes when the next player racks their draw. Hesitate past it and the moment is legally gone.
callsPriority follows the seating, but a mahjong claim beats any exposure claim, even one mid-expose. Know your rights before you argue.
callsYour first exposure narrows your hand to a handful of lines. Make it when the tile is worth the information you hand over.