How to Settle Debates in Philosophy

How is that different from let's say the search for knowledge or arguments in say hard cases? In my world around plant based eating I'm familiar with lots of studies and there's the camp that's completely convinced that 100% vegan diet with no added oil sugar or salt is the optimal human diet. There's a lot of other people who argue different perspectives. How does that work in philosophy where at some point you're like well we're going to agree to disagree or do you feel like if they just understood this or like how do these how do you settle debatesWho gets to be an impartial referee there? You can't always settle the debates it is in that way it's different from the