(n.) One who forms theories; one given to speculation\.

antiblack armchair authority authoritarian authoritative biased bigot bigoted bullheaded chauvinist chauvinistic colored conceited doctrinarian dogged dogmatic dogmatist dogmatizer dogmatizing fanatic hypothesist hypothesizer illiberal infallibilist influenced interested intolerant jaundiced jingo know-nothing magisterial male chauvinist mulish nonobjective obstinate one-sided opinionated opinionative opinioned opinionist oracular partial partisan peremptory pertinacious pig pigheaded pontifical positive positivist positivistic prejudiced prepossessed pronunciative racist self-opinionated self-opinioned sexist speculator stiff-necked stubborn superpatriot superpatriotic swayed theoretic theoretician theorist theorizer twisted ultranationalist undetached undispassionate warped xenophobic