Summary:

- This article discusses the concept of "survivorship bias" in the context of medieval ironworking. Survivorship bias refers to the tendency to focus on the successes and overlook the failures, leading to an incomplete understanding of a situation.

- The article explains how the survival of certain medieval iron artifacts has shaped our modern understanding of medieval metallurgy. The author argues that the high-quality, well-preserved iron objects we see today may not be representative of the full range of iron production techniques used at the time.

- The article also explores how modern metallurgical analysis can provide new insights into the diversity of medieval iron production methods, including less successful or less durable techniques that may have been more common but have not survived to the present day.