It is claimed in The Grand Design that during the early period of inflation when the universe was at the quantum scale, our time dimension behaved like a spatial dimension. But without time, there can be no change, because change is something that occurs over time. Inflation is a change, and hence there would be no way for inflation to occur in the first place, and inflation is necessary in order for the timelike dimension to curl in a way that makes it start acting timelike. In other words, this seems to be a contradiction. Please explain or direct me to a specific explanation.