The term "matters of direct observation" refers to things that we see, hear, touch, taste or smell directly without any intermediary between us and the object of our perception. Synonyms for this phrase include "observable phenomena," "perceptible occurrences," "visible events," "tangible experiences," "sensory perceptions," "existential realities," or simply "observable things." These terms are often used in scientific and philosophical contexts to describe the objective world as it appears to us through our senses. By focusing on what can be directly observed, these terms provide a way to ground our understanding of the world in empirical evidence, rather than abstract concepts or theories.