Originally posted by vistesd
Me too. I suggested that “manifold universes” made more sense as a term. If there is no relationship between multiple universes (i.e., there is no information exchanged?), then the hypothesis is simply not falsifiable. The notion of manifold universes certainly requires one to address the question of how one then defines the Whole (the all-of-all-of-all-o ...[text shortened]... to terminology, and, like you, would like to know how the cosmologists are handling such terms.
its mostly like the use of the term atom...
which means indivisible, and was supposed to be the smallest and 'indivisible'
building block of matter...
till we found smaller stuff that atoms were made of...
but they are still called atoms.
Now while Universe does mean 'everything', and thus you would think would be
'everything' it's general use tends to be the particular set of dimensions we happen
to live in, sometimes just the visible part of those dimensions.
as a word then multiverse does make complete sense.
Basically as long as you make it contextually clear what it is your talking about you
are fine.
Perhaps if the existence of other 'universes' is proved, then people will want to get
clearer and more definitive in the language used to scribe them.
For example if M theory is correct then we might refer to 'Branes' instead of universes
and call the whole thing the universe.
In the mean time I would go with whatever makes you happy, as long as you make it
contextually clear what you are talking about.
(also consider the word cosmos for use, its a good one)