I guess it'd argue you can't judge an argument on its own merits unless it's a philosophical argument. For example the best published scientific studies can't

I guess it'd argue you can't judge an argument on its own merits unless it's a philosophical argument. For example the best published scientific studies can't be judged on their own merits because you have to trust that the scientists actually conducted the studies and didn't fake the data. So you basically have to fall back to some assumption over whether the scientist is honest, not on the merits of what they wrote in the study.