Question

give some arguments and anti arguments about multiverse

Answer 1

If you’re a multiverse skeptic, you should know that there are many potential weaknesses in the case for parallel universes, and I hope you’ll find my cataloging of these weaknesses below useful. To identify these weaknesses in the pro-multiverse arguments, we first need to review what the arguments are. Many physicists have explored various types of parallel universes in recent books, including Sean Carroll, David Deutsch, Brian Greene, Michio Kaku, Martin Rees, Leonard Susskind and Alexander Vilenkin. Interestingly, not a single one of these books (my own included) makes any outright claims that parallel universes exist. Instead, all their arguments involve what logicians know as “modus ponens”: that if X implies Y and X is true, then Y must also be true. Specifically, they argue that if some scientific theory X has enough experimental support for us to take it seriously, then we must take seriously also all its predictions Y, even if these predictions are themselves untestable (involving parallel universes, for example).

As a warm-up example, let’s consider Einstein’s theory of General Relativity. It’s widely considered a scientific theory worthy of taking seriously, because it has made countless correct predictions - from the gravitational bending of light to the time dilation measured by our GPS phones. This means that we must also take seriously its prediction for what happens inside black holes, even though this is something we can never observe and report on in Scientific American. If someone doesn’t like these black hole predictions, they can’t simply opt out of them and dismiss them as unscientific: instead, they need to come up with a different mathematical theory that matches every single successful prediction that general relativity has made - yet doesn’t give the disagreeable black hole predictions. This has proven a remarkably difficult task, eluding many brilliant scientists for about a century. In other words, for a theory to be testable (and hence scientific), we don’t have to be able to test all its predictions, merely one of its predictions.

So are there parallel universes, or is the universe we observe (the spherical region of space from which light has had time to reach us during the 13.8 billion years since our Big Bang) all that exists? We don’t know. The interesting claim that these books collectively make is that various theories imply that various types of parallel universes exist (see table), so that by modus ponens, if we take any of these theories seriously, we’re forced to take seriously also some parallel universes. Conversely, if we can experimentally rule out any of these theories based on their other predictions, we’ve destroyed the evidence for the corresponding parallel universes.

Answer 2

$\huge \bf \red{ \mid{ \overline{ \underline{ANSWER}}} \mid}$

let me make uh understand what multiverse actually is!!

→ multiverse is the collection of universes .

there is an idea that there is more than one universe hence the collection of universes called multiverse.

$\bf{→ \: my \: idea \: on \: multiverse}$

before I start I just wanna ask a question !

what was there before big bang?

if ur answer is nothing,

then tell me how big bang occurred and there should be a space in which it occured .

for big bang it needs energy and hence my idea is that big bang occurred in multiverse like other universes.