User talk:74.96.158.208

October 2023
Please do not add or change content, as you did at Multiverse, without citing a reliable source. Please review the guidelines at Citing sources and take this opportunity to add references to the article. Thank you. -- LemonSlushie 🍋 (talk) (edits) 01:22, 27 October 2023 (UTC)

From Hossenfelder's Lost in Math:

"2. The String Theory Landscape

String theorists hoped to uncover a theory of everything that would contain both the standard model and general relativity. But starting in the late 1980s, it became increasingly clear that the theory cannot predict which particles, fields, and parameters we have in the standard model. Instead, string theory gives rise to a whole landscape of possibilities. In this landscape every point corresponds to a different version of the theory with different particles and different parameters and different laws of nature.

If one believes that string theory is the final theory, then this lack of predictability is a big problem: it means the theory cannot explain why we observe this particular universe. Hence, to make the final theory claim consistent with the lack of predictability, string theorists had to accept that any possible universe in the landscape has the same right to existence as ours. Consequently, we live in a multiverse. The string theory landscape conveniently merged with eternal inflation."

"THE MOST famous multiverse-based prediction is that of the cosmological constant, and it came from none other than Steven Weinberg.31 The prediction dates back to 1997, when string theorists had just recognized they could not avoid getting a multiverse in their theory."