If you are looking to see if a writer of an op-ed peice is qualified to write about that particular topic your intrested primarly in an issue of?

Answer 1

ethos&patheos

pathos apex :)

Answer 2

You would primarily be interested in the writer's expertise, credentials, and experience related to the specific topic they are writing about. This could include their educational background, professional experience, published work, and any relevant knowledge or research they may have in that field.