Ea-nāṣir sold me poor-quality copper. I need high-quality copper. Therefore, I will buy loads of copper from Ea-nāṣir, and sift through it until I find high-quality copper.

The copper market sold me copper, some of which was low quality, some of which was high quality. But instead of continuing to shop at the whole market and developing any sense of what is quality, I've decided to go exclusively to Joe's Best Copper. He tells me his stuff is the best. I don't go to anyone else now so I have no way of comparing it to anything else. Anyway, there's no possible way he could be lying to me, I'm way too smart for than.