Was the universe infinitely large immediately after the Big Bang?

My question: is causality absolutely linear? If we can observe eventual vectors and anicipate a result, we adjust our behavior based upon the likely/inevitable event. The passage of time is a flow of information, which can identify future events in the present, so I have to wonder if causality vioation must be a deal breaker.

 

This was addressed in a book I read (cannot remember title or author) which involved reason murdering deities. The assertion was framed in the manner of nothing being in a perfect state of equillibrium, a state which is analogous to a bowling ball perfectly balanced on the tip of a spear: it is inherently unstable. Nothing diverged from its state in a natural way, thence becoming something. Nothing became something because that was the only possibility. Reality came to exist because it had to.