Sigma KB Term Intersection

No TPTP formula. May not be expressible in strict first order.	Cars.kif 3508-3537	If a wearable item is an instance of hearing protection and an animal is an instance of human and the animal wears the wearable item, then the wearable item has the purpose there exist an entity, another entity and a third entity such that the entity is an instance of process and the other entity is a subclass of the class described by the third entity and the entity prevents the occurrence of the other entity and the wearable item is an instrument for the entity
No TPTP formula. May not be expressible in strict first order.	Merge.kif 13736-13736	Hearing is a subclass of perception
No TPTP formula. May not be expressible in strict first order.	Merge.kif 13780-13780	Listening is a subclass of hearing