EXIST


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EXIST.

On drawings, abbr. for “existing.”
References in classic literature ?
It is true that if the object of knowledge does not exist there can be no knowledge: for there will no longer be anything to know.
Now if that which is perceptible is annihilated, it follows that the body is annihilated, for the body is a perceptible thing; and if the body does not exist, it follows that perception also ceases to exist.
But the perceptible surely exists before perception; for fire and water and such elements, out of which the animal is itself composed, exist before the animal is an animal at all, and before perception.
Occasionally, perhaps, it is necessary to coin words, if no word exists by which a correlation can adequately be explained.
It would be easy to show that within the same group carnivorous animals exist having every intermediate grade between truly aquatic and strictly terrestrial habits; and as each exists by a struggle for life, it is clear that each is well adapted in its habits to its place in nature.
When we see any structure highly perfected for any particular habit, as the wings of a bird for flight, we should bear in mind that animals displaying early transitional grades of the structure will seldom continue to exist to the present day, for they will have been supplanted by the very process of perfection through natural selection.
Even in so extreme a case as this, if the supply of insects were constant, and if better adapted competitors did not already exist in the country, I can see no difficulty in a race of bears being rendered, by natural selection, more and more aquatic in their structure and habits, with larger and larger mouths, till a creature was produced as monstrous as a whale.
In the Articulata we can commence a series with an optic nerve merely coated with pigment, and without any other mechanism; and from this low stage, numerous gradations of structure, branching off in two fundamentally different lines, can be shown to exist, until we reach a moderately high stage of perfection.
Moreover, each species on the confines of its range, where it exists in lessened numbers, will, during fluctuations in the number of its enemies or of its prey, or in the seasons, be extremely liable to utter extermination; and thus its geographical range will come to be still more sharply defined.
It seems as only yesterday--it is in fact fourteen long, long years--that I heard him thus holding forth to his pupils, explaining the marvels of the illimitable void, and rendering clear to my understanding the vast distance that exists between the Being that created all things and the works of his hands.
This is so because the subject (fa'il) is able to exist without the action (fi'l), but it is impossible for action to exist independent of the doer (fa'il).
Counterexamples are presented throughout to show conditions under which Hamiltonian cycles and paths do not exist, and to show that the conditions in the hypotheses of the theorems are essential.