Game Master here. A player has a character who uses whips as their main weapon. They have Whip Mastery and argue that this feat implies that when using a whip, they can perform combat maneuvers without provoking an attack of opportunity. The core of their argument is that combat maneuvers are considered attacks that do not deal damage (and usually add applicable bonuses to the attack). Therefore, they do not provoke attacks of opportunity if performed with the whip while having the feat. What do you think?