"Ignoramus et Ignorabimus" is a Latin phrase that translates to "We do not know and we will not know." It was popularized by the German philosopher Hans Reichenbach in the early 20th century. The phrase reflects a philosophical stance on the limits of human knowledge, suggesting that there are fundamental questions about existence and the universe that may remain forever unanswered. The phrase is often associated with discussions in epistemology, the study of knowledge, and scientific inquiry. It highlights the idea that while we can strive to understand the world through observation and reasoning, some aspects may be inherently unknowable, emphasizing the boundaries of human understanding.