غَلَطُ الْحِسِّ فِي الْبَعْضِ لِأَسْبَابٍ جُزْئِيَّةٍ
Sensory error in some cases arises from particular causes.
Poor lighting, impaired eyesight and great distance are distinct conditions that may produce particular mistakes. If an error is connected with such a condition, its occurrence is compatible with reliable observation when that condition is absent.
For example, mistaking a rope for a snake in darkness does not count against correctly recognizing the same rope in daylight. Indeed, the second observation may help correct the first.
The argument does not promise that one perception reveals everything. It establishes only that a few identifiable failures do not defeat every possible instance of perceptual knowledge.