Dorsey noted these numbers in his opening statement, attributing the efforts to Twitter's automatic detection systems. He told Representative Green that bots were a "complicated issue" but one that Twitter is taking head on. Its systems are geared towards recognizing certain behaviors and patterns that might denote automation as well as an account's intention of action, like artificially amplifying information. Dorsey said that Twitter's systems are now catching more than three times as many suspicious accounts and thwarting twice as many suspicious logins than they were a year ago.