  In this paper, we provide an epistemic analysis of a simple variant of the
fundamental consistent broadcasting primitive for byzantine fault-tolerant
asynchronous distributed systems. Our Firing Rebels with Relay (FRR) primitive
enables agents with a local preference for acting/not acting to trigger an
action (FIRE) at all correct agents, in an all-or-nothing fashion. By using the
epistemic reasoning framework for byzantine multi-agent systems introduced in
our TARK'19 paper, we develop the necessary and sufficient state of knowledge
that needs to be acquired by the agents in order to FIRE. It involves eventual
common hope (a modality related to belief), which we show to be attained
already by achieving eventual mutual hope in the case of FRR. We also identify
subtle variations of the necessary and sufficient state of knowledge for FRR
for different assumptions on the local preferences.
