On the Wikipedia 'History' article, explain the concept of 'Source criticism' within historical methodology, including its main purpose and the typical first step. Additionally, describe the two primary types of historical evidence mentioned in the 'Methods' section and provide one example for each.
Navigate to the Wikipedia 'History' article. Use the table of contents to go to the 'Methods' section. Within the 'Methods' section, locate the 'Sources and source criticism' subsection. Identify and state the primary purpose of source criticism. Identify and state the typical first step in source criticism. Identify and state the two primary types of historical evidence mentioned. Provide one example for each identified type of historical evidence.
State that the primary purpose of source criticism is 'analysing and evaluating the information a source provides'. State that the typical first step in source criticism is 'external criticism, which evaluates the authenticity of a source'. Identify 'Primary source' and 'Secondary source' as the two primary types of historical evidence. Provide an example for a 'Primary source' (e.g., 'official documents, letters, diaries, eyewitness accounts, photographs, audio or video recordings, artefacts, or fossils'). Provide an example for a 'Secondary source' (e.g., 'a source that analyses or interprets information found in other sources', or 'a historian's text about slavery based on an analysis of historical documents').