Assertion: ufo's definition | /r/CapableOf | define ufo
Facets:
Source sentences:
text: To address this issue USI proposed in 2010 that we simply retain the word UFO and define it to reflect what the word is meant to convey in modern language rather than continuing to use historical definitions that define UFOs as what they aren't.
text: For example, historical definitions, particularly the official USAF versions seen above, take the approach of eliminating as many known natural and manmade objects and phenomena as possible and then define UFOs as whatever is leftover.