الْحَوَاسُّ السَّلِيمَةُ
The sound senses.
The qualifier “sound” signals that not every sensation is equally trustworthy regardless of circumstances. The functioning of a sense organ, distance, illumination, and the type of object can affect what appears to the observer. A correctly observed property must be distinguished from a mistaken judgment about the observation.
A distant person appears small, but it does not follow that the person's actual height is only a few inches. Perception presents an appearance under specific conditions, while the inference may neglect distance. Affirming sensory knowledge is therefore different from claiming that every interpretation of sensory experience is immune from error.