3. Whenever I've tried to play the "outside of" or the "before" card in science debate I got emphatically advised that there were neither by resident BBists.
Firstly, BBists makes no sense. There are no Big Bangists (I can't even imagine what that would involve), there are those that think GR and QFTs accuracy at describing the early universe has demonstrated itself and that that "Big Bang" solutions of GR best describe the evolution of the Cosmos.
Secondly, the reason we are hesitant to use those words is two-fold. One of the reasons is already covered here, words like before and outside making little sense when talking about spacetime as a whole.
However the second, possibly the stronger reason, is that the Big Bang is governed by Planckian Scale physics (Quantum Gravity) and we have no idea what concepts from previous physics holds at these scales.
(Some are hesitant to use "Energy")
Edited by Son Goku, : Spelling mistake