In our never-ending search for truth in specifications, we often lose sight of reality. We're inundated with advertising, product data, test reports, and white papers; where once specifiers complained about a lack of information, we now struggle to keep up with what we receive. We can't know what we don't know, and we have no time to evaluate what we have seen. As if that weren't bad enough, we often find that what we thought we knew isn't true.
As an example, consider building insulation. The way it works and its value have been understood since antiquity, and until recently we have felt comfortable with evaluating, specifying, and detailing various types of insulation. And then everything began to unravel.