pseudological
/ˌs(j)uːdə(ʊ)ˈlɒdʒɪkl/adjective
Of, relating to, or characterized by pseudology or the making of false statements.
Origin
Early 17th century; earliest use found in R. C. (fl. c1616). Originally from Byzantine Greek ψευδολογικός lying, false (from ancient Greek ψευδολογία + -ικός) + -al; compare -logical. Compare post-classical Latin pseudologicus false reasoner.