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I thought that "before" became a meaningless idea before (damn, there's no way to say that) expansion because time itself begins with the big bang, to big bang theorists. If, however, quantum loop gravity people (and others) are right instead and the universe oscillates, then there was a before and some version of time before expansion. If there's a multiverse, whether there is such a thing as time there ("there" being another inappropriate word) and if that time is linear in a forward motion, as we experience it, is not known and is probably (or is it?) unknowable.
Is this not an issue like using the word "Theory" to describe the facts of evolution, the atom, and the sun centered solar system? Aren't cosmologists using the idea of the beginning of time in a specialised way?
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