Yes I know, however Alexa did not record in the text the word computer even once in those three attempts. So did she hear the word computer because it was actually spoken, or did she just hear incorrectly? If she heard the actual word computer than she was correct to start listening. If the word computer was never spoken, then she screwed the pooch. By just reading the text Alexa recorded from those attempts, it is not at all clear what item was actually for sale, and therefore the text leaves us unable to determine whether she heard the word computer.