If you had bothered to read the original post, POSTED BY HEISSONEAR, by the way, you'd understand that his point was the absolute assurance of accuracy that is given by the climate zealots.
And again, if you would have bothered to read his original post, you'd see that, unlike you, he doesn't have a problem with math, but rather the level of assurance given by the climate-heads.
When you average the sum of numbers, you can find the average to whatever degree you'd like, since it's math. You can't go outside your house right now and tell me what the temperature is to the hundredth degree, even if you had the best equipment.
That was his point, which you totally missed.
If he had the equipment, he could tell you what the temperature there was to the accuracy of his equipment.
If another person had similar equipment, they could get get a reading where they were. If thousands of people did, we could get thousands of readings. If we averaged those readings, we could get an average for the dataset, though that wouldn't be terribly useful. If we did this over multiple years, we could get a departure from the mean for each site, or an anomaly. We've been trying to explain that last step to heis this whole thread, but he's having a lot of trouble with the concept.
Here's why that last step is important. Average absolute temperature is not well correlated even relatively small distances away. If we were trying to infer the absolute temperatures between stations to meaningful accuracy, we would need an unreasonable number of temperature stations. Temperature anomaly, on the other hand, IS well associated across reasonable distances. Hence, we can meaningfully average temperature anomaly.
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