When Vejur’s probe was reading the computer and Spock smashed the computer console with his fists, the probe attacked Spock. The probe did not return to reading the computer, which indicates either that it had completed its task, or Spock had accomplished his. In either case, why did the probe attack Spock? What logical purpose did it serve? Vejur had no emotions, so it couldn’t have been angry and out for revenge against something it doesn’t even recognize as a life form.