A Lamport Clock diagram depicting a case of “mutual removal” involving a byzantine actor. Duck creates a new group and promotes Penguin. Penguin is a group manager and promotes Parrot to manager access level. Right afterward, Penguin changes her mind about Parrot and immediately demotes him. Parrot chooses to ignore Penguin’s demotion action. As a result, all of Parrot’s future actions are technically considered concurrent with Penguin’s demotion action. Parrot then goes on to demote all other group members, making him then single authority figure in the group. A small "devil" emoji next to Parrot marks him as a bad actor.