Proof using.
currentTerm_sanity_unchanged.
- apply update_elections_data_timeout_leaderLogs.
- find_apply_lem_hyp handleTimeout_type_strong. intuition.
Qed.

Lemma leaderLogs_currentTerm_sanity_append_entries :
refined_raft_net_invariant_append_entries leaderLogs_currentTerm_sanity.