Altimeter setting definition:
"Altimeter setting is defined as station pressure reduced to sea level."
This probably is a stupid question to ask, though i don't understand this. Using this definition for example take Denver International airport which sits at 5,000ft so does it take the pressure at 5000ft and then use the international lapse rate to reduced the setting to sea level? which even at that would probably not give you an accurate pressure altitude as it is unlikely for the lapse rate to be standard. However maybe i'm looking are interpreting this this definition the wrong way.