Those propositions are about the attitudes of a hypothetical ideal observer.

Had anyone with her training in High Magick been with her, the hypothetical observer would have noticed immediately that it was incomplete, lacking one side.

Ideal observer theory holds that what is right is determined by the attitudes that a hypothetical ideal observer would have.

To a hypothetical observer inside the bulge, conditions might initially resemble those of the Big Bang explosion from which our own universe is thought to have arisen.

In short, that hypothetical observer might well have thought himself in the presence of a nuclear detonation.

In other words, to a hypothetical observer placed at the equant point, the center of the epicycle would appear to move at a steady speed.

The laws of relativistic physics applied at any given point in hyper, but as a hypothetical observer looked outward, his instruments showed a rapidly increasing distortion.

Thus, to a hypothetical observer on Mercury, the Sun appears to move in a retrograde direction.

Although it would seem this hypothetical observer of ours could have moved location time and time again.

A hypothetical observer armed with a very accurate thermometer would have said that the internal temperature was fractionally cooler than that of Pod Five.