12 Feb '19 11:01>2 edits
@stellspalfie saidI wear glasses, they are trifocals because my eye sight is very bad. Part of my lens work for different distances, sometimes I have to raise and lower them to bring into focus what I need to see. I use to do testing on CPU where we introduced the parts into various stresses to simulate aging theoretically, to make sure we could say with a level of certainty, the parts will behave as we can guaranty under normal conditions for so many years. Those parts in a short time were affected as if they had been used for a long time if the theory on that test was correct.
Got another quick question for you - What is it about ice core and tree ring data that makes you think its an unreliable source for climate change modelling?
Ice cores and tree rings can be affected by climate, and climate changes, can happen several times in a year, or not so much over a couple of years. The shorter the time the more reliable anything is, but greater the time involved the more things that can happen. Its no different than other rates, we can see a rate of speed of a car on the road, its going 70mph does that mean it was 70mph an hour ago?