— 160 —
      §11. Nor can it be imputed to their want of fit Organs, to frame
articulate Sounds, that they have no use, or knowledge of general
Words; since many of them, we find, can fashion such Sounds,
and pronounce Words distinctly enough, but never with any such
application. And on the other side, Men, who through some defect
in the Organs, want words, yet fail not to express their universal
Ideas by signs, which serve them instead of general words, a faculty
which we see Beasts come short in. And therefore I think we may
suppose, That ’tis in this, that the Species of Brutes are discrimi-
nated from Man; and ’tis that proper difference wherein they are
wholly separated, and which at last widens to so vast a distance. For
if they have any Ideas at all, and are not bare Machins (as some would
have them) we cannot deny them to have some Reason. It seems as
evident to me, that they do some of them in certain Instances
reason, as that they have sence; but it is only in particular Ideas,
just as they receiv’d them from their Senses. They are the best of
them tied up within those narrow bounds, and have not (as I think)
the faculty to enlarge them by any kind of Abstraction.
Locke Hum II, 11, §11, p. 160