How to know BEST is wrong about how they adjust the past

While all the surface data is adjusted, BEST is an easy target,  Fish in a barrel actually.

Here is the actual data, from GHCN

Location

Dale Enterprises is a quality controlled station with no changes, aside from adding an electronic sensor in 1995, but they kept the old mercury instruments as well.

This is what Watts showed in 2010, about the USHCN adjustments

Here is the current GHCN adjustment, using the BOM tool

Compared to the actual data

And here is what BEST did to the data

Just awful "science" at work there.  Instead of using a quality station to adjust the bad stations, they adjust the good station to match the bad ones.

Here's a nearby bad station moved next to water treatment plant, showing a drastic increase in the trend.

Google maps of water treatment plant where that station rests.

BEST and the rest of the data analysis adjusted the good station, not the bad ones.They are wrong, but they probably don't even know it.