If people who claim to have been abducted by aliens really have been abducted, then we would need to take reports of UFO sightings very seriously. However, such claims are very unlikely to be true....

If people who claim to have been abducted by aliens really have been abducted, then we would need to take reports of UFO sightings very seriously. However, such claims are very unlikely to be true. Therefore, we do not need to take reports of UFO sightings seriously. (Cf. Questions appendix, passage 7)