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There is a brief moment within this period when time effectively ceases to exist, this is known as inflation.
Quote from: MikeSThere is a brief moment within this period when time effectively ceases to exist, this is known as inflation.3 questions, here, Mike:1) Any moment, however brief is a segment of time; how can you have a moment when time does not exist?2) If inflation occurs during this moment, there must be change; how can you have change unless you have time to measure it?3) If time does not exist during this period, how can you say it is brief? Surely it could equally well be an eternity.
Time is a prerequisite for causality. The rate of flow of time is infinite but in both directions ‘at the same time’. Although the universe is inflating, it does so outside of ‘time’ and with no causality. This is a part of the cycle of the universe that does not support life so from that point of view the fact that we cannot measure it is irrelevant. An observer outside the universe could measure the time inflation took.