|Unobservable, philosophy of science: What is unobservable depends on the theory that is applied to refer to a subject domain. Physically unobservable are e.g. electrons when electrons are used to make observations. See also uncertainty principle, theoretical entities, observation, observability, theories, recognition, epistemology._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. |
Unobservability/Fraassen: as long as we do not forbid negation, we can express in an observation language that something is unobservable. And we can even express to a certain extent, how these unobserved entities are. - E.g. Unobservable/Copenhagen interpretation: says that there are things that sometimes have a certain position and sometimes not. - N.B.: that was expressed without using a single theoretical term - e.g. the consequence of a theory: absolute space: would have neither position nor volume. - this has nothing to do with what exists in the observable world. - N.B.: a theory reduced to observation language would not be a description of a "part of the world". - ((s) because there is no meaningful separation observable/unobservable - Syntax/Fraassen: this is only a problem for the syntactic representation of theories.
Limits of observability are empirical, not philosophical.
Unobservable/Truth/Theory/Fraassen: if a theory has implications about the unobservable, then evidence does not guarantee the truth of the theory. ((s) this practically always the case.) -Conversely, the evidence would never justify a conclusion that goes beyond this evidence. - Conclusions about what is observable also go beyond the evidence.
Fraassen: There are no rationally compelling reasons to go beyond the evidence._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. The note [Author1]Vs[Author2] or [Author]Vs[term] is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition.
B. van Fraassen
The Scientific Image Oxford 1980