The non sequitur is the Latin phrase for “(it) does not follow.” It means that the conclusion reached does not follow from the premise(s).
Examples of non sequitur arguments are hilariously disconnected, but often they can be subtle and may not be easily uncovered. The arguments are fallacious since they do not provide any evidence for an argument and are just meant to confuse the listener.
Vaccines are dangerous. Which means the moon landings were faked.