According to sources who can be expected to know, Dr  Maria Esposito is going to run in the mayoral election  But if Dr  Esposito runs, Jerome Krasman will certainly not run against her  Ttherefore Dr
Esposito will be the only candidate in the election
An informant says that Rustimann was involved in the bank robbery. If Rustimann was involved, Jones was certainly not involved. Since these two are the only people who could have been involved, Rustimann is the only person the police need to arrest.