I might well be. Given the value of empiricism-type virtues, anyone want to go test it (by creating an operationalized notion of what it is to understand the heuristics, and then finding randomly choosing several people independently from e.g. your local grocery store and testing it on them), and let us know the results?

Jasen Murray and Marcello and I tried this the other day concerning what portion of native English speaking American adults know what a "sphere" is ("a ball" or "orange-shaped" count; "a circle" doesn't), and found that of the five we sampled, three knew and two didn't.