This document discusses various types of "blindness" that can occur when applying machine learning modeling procedures and techniques. It notes that modeling procedures often focus on decomposing problems and data in a way that can lose important connections or information. Specific issues highlighted include the gap between problems and available data, information loss when converting data to vectors, disconnects between mathematical concepts and real-world applications, limitations of individual ML techniques, and challenges with new data and labels. The document advocates thinking more from both data-driven and problem-driven perspectives, and considering alternative techniques that can bridge gaps, such as metric learning and one-versus-all classifiers.