Challenge 6: UFOs - Unidentified Flying Objects

Much debate surrounding the existence, or otherwise, of UFOs as spacecraft carrying extraterrestials to Earth hinges on a range of implicit assumptions which often go unquestioned.

Hypothesis 1: UFOs are spacecraft carrying extraterrestials.

Some assumptions:

• ETs can and would travel to Earth.
• UFOs are the ETs spacecraft.
• ETs would not make themselves known to the general public in an obvious way.

Hypothesis 2: UFOs are unidentified natural or man-made events or objects.

Some assumptions:

• Any ETs existing could not or would not come to Earth.
• All evidence of UFOs is publically available.
• There is no reason why governments/military would want to keep ET contact secret.
• Most UFOs have been identified as natural or man-made events or objects.
• If there were ETs in UFOs they would have made themselves known to everyone in an obvious way.
• Apparent evidence such as photographs, sightings, direct communication, etc are deliberate hoaxes, misperceptions or misinterpretations.
• Investigations that support apparent evidence are carried out by unqualified gullible people.