Colorless green ideas sleep furiously
SENTENCE COINED BY NOAM CHOMSKY TO DESCRIBE PROPER SYNTAX WITH IMPROPER SEMANTICS
Colourless green ideas sleep furiously; Colorless green ideas; Colourless green ideas; Green ideas; Furious sleep; Furiously sleep ideas green colorless; Green ideas sleep furiously; Colorless green ideas sleep furiously.; CGISF; Colourless green thoughts sleep furiously; Colorless green thoughts sleep furiously
Colorless green ideas sleep furiously is a sentence composed by Noam Chomsky in his 1957 book Syntactic Structures as an example of a sentence that is grammatically well-formed, but semantically nonsensical. The sentence was originally used in his 1955 thesis The Logical Structure of Linguistic Theory and in his 1956 paper "Three Models for the Description of Language".