I formally propose a new English word for your consideration.
dopinion– noun – \dp-in-yən \
1 : an idiotic view, judgment, or appraisal formed in a simple mind about a particular matter
2 : a dumb-ass belief stronger than impression, less strong than positive knowledge, and generally dismissed by anybody with half a brain
Before the meeting got underway this morning, the moron from accounting gave us his dopinion on gay marriage.