 In the original draft script, there was a banquet scene featuring  the three main diplomats: Sarek (the Vulcan), Shras (the Andorian),  and Gav (the old Tellerian). When this scene was scrapped, the  dialog was inserted into the final version of the buffet scene.  Other dialog was scrapped that would have indicated that Sarek was  an engineer before he became a diplomat, and that he was the son of  the famous Vulcan diplomat Shaleris.