if an preposition populations something into something else then that preposition is a sink of that something else
preoccupation is idea. hypothesized_instance is non_skolem_indeterminate_term. preposition_of is preposition. preoccupation is cognitive_state. one_impairment_person_might has cerebral_thrommbosis self_absorption is preoccupation. abstractedness is preoccupation. head is individual. sink is tangible_thing. common_cold is self_limiting_thing.