That's really not how languages work. Even between different scientific disciplines. For example, what is covariance? Besides, the criticism was overly pedan

That's really not how languages work. Even between different scientific disciplines. For example, what is covariance? Besides, the criticism was overly pedantic, but alas. The explanation wasn't even that bad. Decomposition of a design problem in a set of orthogonal questions is exactly what is being described. Solving then the problem by providing solutions that don't overlap is also what is being described. And the author is right about mentioning that because it's not actually obvious that giving a solution to each "eigenquestions" provide a canonical basis for the solution space, so to speak. Really it seems that people want to be pedantic just to be pedantic... I don't think such arrogance is warranted here.