Exact(1)
Because its rising or setting is always within about two hours of the Sun's, it is never observable when the sky is fully dark.
Similar(59)
More generally, it is worth noting the basic point that in the many experiments which seek to study time perception, the observer's percept is never directly observable.
Cosmic censorship and veiled non-locality provide a prop for materialism, because it can be taken as axiomatic that some aspects of reality will never be observable; this removes the onus for finding data that support the emergence of consciousness.
Although these transient virtual photons can never be observed, they contribute measurably to the probabilities of observable events.
These "solutions" would never account for how objectively observable events turn into the first-hand feeling of a private experience.
However, this topic has never been investigated using specific, clinically observable symptoms of manic or mixed episodes.
Consider the claim 'x is observable' for some x that is never actually observed.
The present never is in the sense of being observable, but it can be understood meaningfully to the extent that the past asserts its presence in it.
Such abstract properties or attributes as intelligence or introversion never are directly measured but must be inferred from observable behaviour.
We move through such time in the same way we drive a car: calculating the distance passed while coordinating our movement with that of other drivers, passing through an environment that can never be particularly significant and which will soon be observable in the mirror.
At the JREF, we've never seen a self-described 'psychic' who could demonstrate an observable 'psychic' power without cheating.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com