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      §14. But yet, I cannot but think, there is some small dull Percep-
tion, whereby they are distinguished from perfect Insensibility.
And that this may be so, we have plain instances, even in Mankind
it self. Take one, in whom decrepid old Age has blotted out the
Memory of his past Knowledge, and clearly wiped out the Ideas his
Mind was formerly stored with; and has, by destroying his Sight,
Hearing, and Smell quite, and his Taste to a great degree, stopp’d
up almost all the Passages for new ones to enter; or, if there be some
of the Inlets yet half open, the Impressions made are scarce per-
ceived, or not at all retained. How far such an one (notwithstanding
all that is boasted of innate Principles) is in his Knowledge, and
intellectual Faculties, above the Condition of a Cockle, or an Oyster,
I leave to be considered. And if a Man had passed Sixty Years in
such a State, as ’tis possible he might, as well as three Days, I
— 149 —
wonder what difference there would have been, in any intellectual
Perfections, between him, and the lowest degree of Animals.
Locke Hum II, 9, §14, pp. 148-149