Yes we do know, if we are willing to accept it. The "methodology" is as simple as it is powerful: God spoke and it was so.
With His own hand he wrote in the 10 commandments that He made the universe and man in six days and rested the seventh. Will you question what God Himself wrote with His own hand -- in His own Law, no less?
If you say you believe that God wrote the 10 commandments with His own hand (Exodus 31:18) you must necessarily have a major problem with the premise of evolution.
The first thing God created was time ("In the beginning...) He defined a time interval for "day" on the 1st day, and created celestial clocks for the creation's benefit to allow us to measure that interval on the 4th day. Get it? The time interval was fixed, and God created the "clock" days later to allow us to measure time, and appreciate it.
So when God created the universe in 6 days that is exactly what He meant as He said it and wrote it. No time for evolutionary speculation. he created no time nor mechanism for that speculation to occur -- that is, if you believe what He wrote with His own hand.
It is up to you to choose to believe what He wrote.
It's no more difficult than that.
If God Himself has limited your freedom to define time and His chosen methodology of Creation as you might otherwise desire to define it - and He did this by virtue of the way He defined that time should be measured, who are you to say otherwise, "Smarty Pants"? :-)
FReegards!
