Comment Re:Not what I said (Score 5, Insightful) 199
We use proxy data all the time, and no one complains, but if it comes to historic weather and climate data, everyone suddenly is an expert in measurement theory. In fact, all measurement itself is using proxy data. We can't experience electric current to some precision. Instead, we are measuring the force induced in a wire. And as we can't experience force very precisely, we cause the force to tense a spring, and then we read out the angle difference. Do you argue that the angle of distortion of the spring is not the actual current read-out, but some massaged data, which should be treated as such?
That's exactly what we are doing. Each measuring instrument has a label indication the expected error bar of the measurement. But if we do it for proxy temperature data, it's suddenly something we should refrain from?