Not To Be Confused With
Heterodoxy is milder than heresy. Heresy denies a core defined doctrine; heterodoxy leans away from the consensus on a serious matter without necessarily crossing into a denial of the essentials.
From heteros (“other”) + doxa. Heterodoxy marks views that are out of step with the historic mainstream but not clearly heretical — a useful middle category for teachings that are dubious or imbalanced rather than damnably false.
Theologos applies it carefully: for example, groups that deny the Trinity (which is heresy by the historic definition) are classified as heterodox-to-heretical, not as denominations within orthodoxy.