Definition of pseudo-rationality in US English:
pseudo-rationality
noun
Pseudo-rational quality or nature; a system or argument characterized by this.
Origin
Late 19th century; earliest use found in The Philosophical Review. From pseudo- + rationality, after pseudo-rational.
Pronunciation
pseudo-rationality
/ˌs(j)uːdə(ʊ)raʃəˈnalɪti/