This document discusses various perspectives on errors in second language acquisition. It begins by defining the key terms of "error" and "mistake" and explains that errors are what learners make while mistakes are what native speakers make. It then examines some of the common causes of errors, such as first language interference, overgeneralization, incomplete application of rules, and fossilization. The document also discusses whether all errors should be corrected and considers the inevitability of errors as part of the language learning process. It emphasizes that the goal of language learning is meaningful communication and corrections should target errors that interfere with understanding, not minor inaccuracies.