A person who believed in or promoted the theological doctrine of adoptionism.
From 'adoptianism' plus the suffix '-ist' (one who practices or believes in). Medieval theologians who held this belief were called adoptianists, and some faced ecclesiastical condemnation.
Adoptianists were branded as heretics by mainstream Christianity, yet they were asking logical questions: how could Jesus be both fully human and fully divine? Their unpopular doctrine shows that theological 'losers' often asked the hard questions.
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