Experient
Part of speech: adjective
Definition: Met with in the course of experience.
Part of speech: noun
Definition: A person who experiences something.
Knowledgeable
Part of speech: adjective
Definition: having knowledge, especially of a particular subjecteducated and well informedintelligent and perceptive
Example sentence: Being deeply knowledgeable on one subject narrows one's focus and increases confidence, but it also blurs dissenting views until they are no longer visible, thereby transforming data collection into bias confirmation and morphing self-deception into self-assurance.