Doubt is the beginning, not the end, of wisdom. Aphorisms aside, I think it's instructive to honor doubt in service of gaining wisdom. When we doubt that parts quality matter, or the topology of a circuit can have a major sonic impact, we can dismiss it or embrace it. Dismissing something as nonsense simply because it doesn't fit into our worldview is self-limiting. What wisdom do we gain by blowing it off? If, on the other hand, we keep an open mind in service of curiosity, we open ourselves to new possibilities and understanding. It is healthy to doubt and even healthier to investigate that which does not immediately ring as true. The wise audiophile is open to new ideas, new methods of achieving sonic purity.