But that thing of his dissembling was only subject to his perceptibility, not to his will determinate.
perceptibility or conceivability are, then, the two forms which reality may assume.
If desired, the gradation of intensities here employed may be refined to the threshold of perceptibility, or beyond it.
early 15c., "perceptive," from Late Latin perceptibilis "perceptible," from Latin percept-, past participle stem of percipere (see perceive). Meaning "capable of being perceived" is from c.1600. Related: Perceptibly; perceptibility.