Group 1 - The article discusses the importance of understanding the interactions of moving parts within a machine to determine its output [1] - Tim Worstall is identified as a wholesaler of rare earth metals and an expert in scandium, contributing to various media outlets [1] Group 2 - The disclosure emphasizes that past performance does not guarantee future results and that no specific investment advice is provided [2] - It clarifies that Seeking Alpha's analysts are third-party authors, including both professional and individual investors [2]