In the case of solid figures a more difficult geometrical abstraction is involved.
The abstraction keeps moving forward, and the technology races to keep up.
By this theory, Hume is freed from all the problems of abstraction and judgment.
This, again, is a process of abstraction, the attainment of abstract ideas which, apart from the concrete individuals, are conceived as having a substantive existence.
Berkeley, though at length the notions of spirits, acts and relations 6 give him pause, prefers the formula which Hume expresses in the phrase that " some ideas are particular in their nature but general in their representation," 7 and the afterhistory of " abstraction " is a discussion of the conditions under which one idea " stands for " a group. Not from those for whom general ideas mean schematic concepts, not imageable.