[starbase]

...but even if the numbers aren't accurate you're still comparing off numbers to off numbers so the decline is consistent.

This is not valid logic. Wrong data compared to wrong data can only produce a wrong conclusion.

[Bob J]

"This is not valid logic. Wrong data compared to wrong data can only produce a wrong conclusion."

Not true, it depends on what information you are looking at. Let me use the thermometer example. You got a good one that reads 70 degrees duringthe day than drops to 65 degrees at night. Then you got bad one that is off by 10 degrees. It may read 60 degrees and drop to 55 on the same night as the good one, but they both accurately recorded the 5 degrees drop.