This is the talk page for discussing improvements to the Inflation (cosmology) article. This is not a forum for general discussion of the article's subject.

Put new text under old text. Click here to start a new topic. New to Wikipedia? Welcome! Learn to edit; get help. Assume good faith Be polite and avoid personal attacks Be welcoming to newcomers Seek dispute resolution if needed Article policies Neutral point of view No original research Verifiability

Find sources:  Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL

Archives: 1, 2, 3, 4, 5Auto-archiving period: 90 days

	Inflation (cosmology) was one of the Natural sciences good articles, but it has been removed from the list. There are suggestions below for improving the article to meet the good article criteria. Once these issues have been addressed, the article can be renominated. Editors may also seek a reassessment of the decision if they believe there was a mistake.
Article milestones Date Process Result January 1, 2006 Good article nominee Listed November 7, 2006 Peer review Reviewed May 22, 2009 Good article reassessment Delisted A news item involving this article was featured on Wikipedia's Main Page in the " In the news" column on March 17, 2014. Current status: Delisted good article

This   level-4 vital article is rated C-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects:

Astronomy: Cosmology High‑importance This article is within the scope of WikiProject Astronomy, which collaborates on articles related to Astronomy on Wikipedia.AstronomyWikipedia:WikiProject AstronomyTemplate:WikiProject AstronomyAstronomy articles High This article has been rated as High-importance on the project's importance scale. This article is supported by Cosmology task force. Physics: Relativity High‑importance This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles High This article has been rated as High-importance on the project's importance scale. This article is supported by the relativity task force.

Tip: Anchors are case-sensitive in most browsers. This article links to one or more target anchors that no longer exist. [[cosmic microwave background#Low multipoles]] The anchor (#Low multipoles) has been deleted by other users before. Please help fix the broken anchors. You can remove this template after fixing the problems. | Reporting errors

"three-dimensional sphere" ? = Information

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) reply

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) reply

@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) reply

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) reply

@ Mokurai: 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) reply