The logical fallacy that uses bait and switch is known as the red herring fallacy. This fallacy occurs when an argument is diverted away from the original topic to a different, often irrelevant topic, in order to mislead or distract the audience.
In a bait and switch scenario, the initial argument is presented to lure someone in, much like how a seller might advertise a fantastic deal to attract customers. However, once the audience is engaged, the focus is shifted to a different issue, effectively sidestepping the original argument.
This tactic can be particularly misleading because it can create the impression that the initial topic has been addressed when, in reality, it has been ignored. Recognizing this fallacy can help in identifying when an argument is being manipulated and can aid in maintaining logical discourse.