I get heartfelt thanks from all kinds of people. Today I heard from a waitress in Georgia who has lost her job and is trying to figure out how her local bank can change the terms on her credit card and I heard from a physicist at a major research university who wants to explain a better theory of financial stress tests.
We often attribute 'understanding' and other cognitive predicates by metaphor and analogy to cars adding machines and other artifacts but nothing is proved by such attributions.