The act or process of declaring someone heretical or of making something heresy.
From hereticate (verb) + -ion (abstract noun suffix). Forms the noun of action, allowing discussion of heresy condemnation as a process rather than a state, particularly common in historical theological contexts.
The 'heretication' of ideas like heliocentrism (sun at center of solar system) shows how the church's process for condemning beliefs could be completely wrong—Galileo was declared heretical for being scientifically correct.
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