World

The first link is reality itself, untouched by any instrument. Ask whether the thing you believe changed actually exists out there and could plausibly move that fast, separate from anything a chart, survey, or observer recorded about it.

The first link is reality itself, untouched by any instrument. Ask whether the thing you believe changed actually exists out there and could plausibly move that fast, separate from anything a chart, survey, or observer recorded about it.

Example

In the satisfaction case, you ask: would real customer happiness realistically drop 13 points in three weeks with no outage, no price change, and no shipped feature? Nothing in the world explains it, so suspicion shifts to the later links.