Instruct: Classify Amazon reviews into positive or negative sentiment
Query: He explains everything. Very detailed.

He has very clear biological explanations, all referenced to research on the subject, and clearly explains why the methanol-multiple sclerosis hypothesis has been downplayed and overlooked by researchers from the time the disease was first discovered. This was a very insightful and convincing lecture on the methanol-multiple sclerosis hypothesis, to the point where I'm convinced it can be considered concluded.