Each deal is scored from the Duplicate Bridge Scoring Table (Law 77), which sets trick scores, premiums and penalties; Declarer's side scores if it makes the contract; the defenders score if it fails; Vulnerability, shown on the board, raises both the bonuses and the penalties
Why people argue about this
People often assume that in Duplicate Bridge, if a deal is made by one team (Declarer's side), they automatically get all the points regardless of Vulnerability status, leading to disputes when they should only earn half the usual score due to Vulnerability. The confusion arises because the official scoring table and vulnerability status are interwoven but often overlooked in the heat of play.
