Assertion: optical illusion | /r/HasProperty | cool images
Facets:
value: pretty
type: DEGREE
Source sentences:
text: Optical illusions (sometimes called also visual illusions) are cool images perceived in a manner that differs from objective reality.
text: Some optical illusions are pretty cool to watch, but an illusion can also point to an erroneous belief or false perception of reality, which is where you start getting into hallucination territory — seeing things that aren't there.