Legal Completion
Why People Get This Wrong
People think that as long as the cup touches the table briefly during its rotation, it's still considered a legal completion, which leads to misunderstandings about how much contact is allowed without disqualifying the move. The confusion arises because the rule specifically states brief contact with the table during the rotation is allowed, but doesn't clarify what "brief" means in this context.
Official Verdict
The cup must make a distinct airborne rotation and settle with its open rim against the tabletop. Brief contact with the table during the rotation is allowed.