Heretical, reminds of hierarchy which means divisions of labor with set rules, therefore one which doesn't follow the set rules is "heretical"
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he is heretical - coz he calls 'hereditary' (accepted) policies as 'kal'(past) ki policies.
Theoretical => related to accepted beliefs......Heretical => departing from accepted beliefs
HERE-tical means orthodox. Here can be inferred to be what is current.
Focus on the HE--In "The Scarlet Letter," HEster Prynn was considered heretical for violating their beliefs.