An analysis team led by Anthony Watts has shown that 70% of the USHCN temperature stations are ranked in NOAA classification 4 or 5, indicating a temperature uncertainties greater than 2C or 5C, respectively….. From this analysis we conclude that the difference in temperature rate of rise between poor stations and OK stations is –0.014 ± 0.028 C per century. The absence of a statistically significant difference between the two sets suggests that networks of stations can reliably discern temperature trends even when individual stations have large absolute uncertainties.