Until recently the great majority of naturalists believed that species were immutable productions, and had been separately created.

He argues with much force on general grounds that species are not immutable productions.

I am fully convinced that species are not immutable; but that those belonging to what are called the same genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of any one species are the descendants of that species.

It should be added that De Candolle no longer believes that species are immutable creations, but concludes that the derivative theory is the most natural one, "and the most accordant with the known facts in palaeontology, geographical botany and zoology, of anatomical structure and classification."

Nor can it be pretended that it is an immutable law that marsupials should have been chiefly or solely produced in Australia; or that Edentata and other American types should have been solely produced in South America.

But after very long intervals of time, and after great geographical changes, permitting much intermigration, the feebler will yield to the more dominant forms, and there will be nothing immutable in the distribution of organic beings.

The belief that species were immutable productions was almost unavoidable as long as the history of the world was thought to be of short duration; and now that we have acquired some idea of the lapse of time, we are too apt to assume, without proof, that the geological record is so perfect that it would have afforded us plain evidence of the mutation of species, if they had undergone mutation.

For the most part, in this tropic whaling life, a sublime uneventfulness invests you; you hear no news; read no gazettes; extras with startling accounts of commonplaces never delude you into unnecessary excitements; you hear of no domestic afflictions; bankrupt securities; fall of stocks; are never troubled with the thought of what you shall have for dinner--for all your meals for three years and more are snugly stowed in casks, and your bill of fare is immutable.

In R6RS every binding, including the standard ones, belongs to some library, and all exported bindings are immutable.

An identity is assumed to be the only property of an entity that is always present and immutable.

By the start of the third film, Smith has managed to copy himself over nearly every humanoid in the Matrix, giving him complete control over the "Core Network" (the underlying foundation of the inner workings of the Matrix), thus rendering him immutable by even the Machines themselves.

What we said in Greene v. McElroy is particularly pertinent here: Certain principles have remained relatively immutable in our jurisprudence.

In Aziam, the key to successful community identity is in the immutable words of a one-time US President, John F. Kennedy, which, when paraphrased, translates to: seek how you can add value to rather than take it from Aziam.

The refutation of orthogenesis had some ramifications in the field of philosophy, as it questioned the idea of teleology or existence of immutable "forms" in nature, as first developed by Aristotle and accepted by Immanuel Kant, who had greatly influenced many scientists.