Talk:Inflation (cosmology)

= "three-dimensional sphere" ? == In the text "three-dimensional sphere" links to the article on "3-sphere" and I suggest to change "three-dimensional sphere" to "3-sphere" because the former suggests to actually be a 2-sphere, i.e. a 2-dimensional "equidistance-object" embedded in 3D. --46.91.59.169 (talk) 13:31, 12 October 2021 (UTC)

Hypothesis / Theory
The first introductory sentence of the article calls the Cosmic Inflation a "theory", making a false impression that it is an established scientific fact. There is still a debate about the validity of this hypothesis in the scientific community. Calling something a Scientific theory requires a much higher level of validation and experimental/observational testing. The phrasing is also in contrast with articles in other languages: German, French, Italian and Russian versions in different ways, but all mention the hypothetical nature of the subject at the outset.

I suggest changing the wording completely - by calling it a "hypothesis" or a "model". Or, at least, add a clarification that it "...is a theory that hypothesizes a period of exponential expansion of space...". — Preceding unsigned comment added by Kanishev~enwiki (talk • contribs) 18:38, 14 February 2022 (UTC)


 * @Kanishev~enwiki
 * I agree. I think the most accurate description of the current situation is that it "is a collection of theoretical models that hypothesized a period of exponential expansion of space...". I hope someone would change the current language in the article.
 * CA2MI (talk) 17:16, 3 October 2022 (UTC)
 * All theories are provisional. While there is certainly research exploring alternative models, and some disturbing data from Webb, there is too much evidence supporting the old "Big Bang" and newer hyper-inflationary models to label them as mere hypotheses. --Shmuel (Seymour J.) Metz Username:Chatul (talk) 11:41, 4 October 2022 (UTC)
 * All theories are provisional. While there is certainly research exploring alternative models, and some disturbing data from Webb, there is too much evidence supporting the old "Big Bang" and newer hyper-inflationary models to label them as mere hypotheses. --Shmuel (Seymour J.) Metz Username:Chatul (talk) 11:41, 4 October 2022 (UTC)

Singularity?
A recent edit removed a reference to the initial singularity with a comment mentioning Quantum Mechanics. I believe that the literature describe the big bang from a classical General Relativity perspective, especially in the early days, and that no definitive answer will be available until there is a viable Quantum Gravity theory. Shmuel (Seymour J.) Metz Username:Chatul (talk) 12:45, 26 February 2023 (UTC)