Unalterable

The unalterable rhythm of mathematics is definition, theorem, proof.

For instance, here is a portrait of a man at eight years old, another at fifteen, another at seventeen, another at twenty-three, and so on. All these are evidently sections, as it were, three-dimensional representations of his four-dimensioned being, which is a fixed and unalterable thing.

In the theory of knowledge, as in every other branch of science, we must think dialectically, that is, we must not regard our knowledge as ready-made and unalterable, but must determine how knowledge emerges from ignorance, how incomplete, inexact knowledge becomes more complete and more exact.

People of unalterable ideas still insisted upon calling him "Sergeant" when they met him, which was in some degree owing to his having still retained the well-shaped moustache of his military days, and the soldierly bearing inseparable from his form.

... every statute in the Bible and in the law books is an attempt to defeaat a law of God—in other words an unalterable and indestructible law of nature.

For instance, we’d need to make one of the following assumptions: (1) that the system will be programmed with an unalterable goal preservation meta-goal, (2) that the training process would select for such a meta-goal, or (3) that the adoption of the meta-goal itself is instrumentally convergent.