" The rule which should guide us in such cases is simple and obvious enough: that the aggregate testimony of our neighbours is subject to the same conditions as the testimony of any one of them. "
- William Kingdon Clifford

When faced with evaluating the reliability or truthfulness of information from others, it's helpful to consider that the collective opinion of a group should be treated no differently than an individual’s testimony. This means we must critically assess and question any information presented by multiple people just as carefully as if it were coming from a single source.

The deep meaning behind this statement is about skepticism and critical thinking. It emphasizes the need for individuals to not simply accept information based on the number of people agreeing upon it but instead evaluate each piece of evidence individually, no matter how many voices support or refute it. This approach encourages us to look beyond popularity and majority opinion when seeking truth, fostering a culture where facts are verified independently rather than accepted due to their widespread endorsement.

William Kingdon Clifford was an influential 19th-century English philosopher and mathematician known for his contributions to philosophy of science and ethics. His work often explored the importance of intellectual integrity and the moral implications of belief formation, reflecting a commitment to rigorous thinking and ethical behavior in both personal and professional contexts.